12 Science Activities for Preschoolers

Have you ever watched a child’s eyes light up when they discover something new? Preschoolers are natural scientists—curious, inquisitive, and eager to understand how the world works. Science activities offer the perfect opportunity to harness this innate curiosity while developing critical thinking skills, vocabulary, and a sense of wonder. In this article, we’ll explore 12 engaging, easy-to-implement science activities that require minimal preparation but deliver maximum excitement and learning for your preschoolers.

Why Science Matters in Early Childhood Education

Science exploration in early childhood lays the foundation for future learning across all subjects. When children engage in hands-on science activities, they’re not just having fun—they’re developing observation skills, learning to make predictions, and discovering cause-and-effect relationships. These early experiences shape how children view the world and approach problem-solving.

What makes science activities particularly valuable is their ability to integrate multiple learning domains simultaneously. As children measure ingredients for a volcano experiment, they’re practicing math. When they describe what happens during a color-mixing activity, they’re building language skills. These cross-disciplinary connections make science an incredibly efficient teaching tool in busy childcare settings.

For childcare providers and preschool teachers, documenting these learning moments is essential for sharing children’s progress with parents and building comprehensive learning portfolios. Let’s dive into these exciting activities that will turn your classroom into a laboratory of discovery.

Must-Have Science Activities for Preschoolers

1. Erupting Volcano

Supplies Needed:

• Small plastic bottle or cup
• Baking tray or plastic container
• Baking soda (2-3 tablespoons)
• Vinegar (½ cup)
• Red and yellow food coloring
• Dish soap (1 tablespoon)
• Clay or playdough (optional, for decorating)

How to Do It:

1. Place the bottle in the center of the tray
2. If using clay, help children mold it around the bottle to create a volcano shape, leaving the opening accessible
3. Mix food coloring with vinegar in a separate container
4. Add dish soap and baking soda to the bottle
5. Pour the colored vinegar into the bottle and watch the eruption

Educational Purpose: This activity helps children learn about cause and effect: “When we mix these ingredients, something exciting happens!” They practice making predictions (“What will happen when we pour this in?”) and learn simple vocabulary like “eruption” and “reaction.” It’s also a fun way to introduce the concept that some things, when mixed together, create something new.

2. Magic Milk Color Explosion

Supplies Needed:

• Shallow dish or plate
• Whole milk (works better than low-fat)
• Food coloring (various colors)
• Dish soap
• Cotton swabs

How to Do It:

1. Pour enough milk to cover the bottom of the dish
2. Add drops of different food colors scattered across the surface
3. Dip a cotton swab in dish soap
4. Touch the soap-covered swab to the milk and watch colors explode and swirl

Educational Purpose: This colorful activity helps children practice describing what they see using words like “swirl,” “mix,” and “move.” They learn that soap does something special to milk that makes colors dance around. It’s a perfect opportunity for children to practice observation skills and talk about different colors and patterns.

3. Dancing Raisins

Supplies Needed:

• Clear glass or plastic cup
• Carbonated water or clear soda
• Raisins
• Magnifying glass (optional)

How to Do It:

1. Fill the cup with carbonated water
2. Drop several raisins into the liquid
3. Watch as raisins “dance” up and down
4. Use magnifying glasses for closer observation

Educational Purpose: Children love watching the raisins move up and down “like they’re dancing!” This activity helps them notice that tiny bubbles stick to the raisins, making them float up. When the bubbles pop, the raisins sink again. It’s a fun way to talk about things that sink and float, and to practice using words like “up,” “down,” and “bubble.”

4. Rainbow Jar Density Experiment

Supplies Needed:

• Tall, clear container or jar
• Honey
• Dish soap
• Water
• Vegetable oil
• Rubbing alcohol (teacher-handled only)
• Food coloring for each layer
• Small objects of varying densities (optional)

How to Do It:

1. Pour honey at the bottom of the jar
2. Carefully add colored dish soap
3. Mix water with food coloring and slowly pour it in
4. Add colored oil
5. If using alcohol (adults only), add as the top layer
6. Observe how liquids form distinct layers

Educational Purpose: This colorful experiment shows children that different liquids can stack on top of each other without mixing right away. Children practice using comparing words like “heavier,” “lighter,” “top,” and “bottom.” They also strengthen their observation skills by noticing how each liquid behaves differently.

Record Science Learning with Daily Connect

As children engage in these exciting experiments, capturing their reactions, questions, and discoveries becomes an important part of the learning process. Daily Connect’s Learning & Assessment tools make it easy to document these valuable moments and connect them to educational frameworks and developmental milestones.

With Daily Connect, teachers can take photos of children conducting experiments, record their observations and predictions, and instantly share these learning experiences with parents. This documentation serves multiple purposes:

• It helps teachers reflect on children’s learning and plan next steps
• It creates a visual record of skill development over time
• It engages families in their child’s scientific discoveries
• It provides evidence of curriculum implementation for regulatory requirements

The digital portfolios created through Daily Connect allow educators to tie science activities directly to learning standards. For example, when documenting the “Magic Milk” experiment, teachers can tag relevant developmental domains like scientific inquiry, cause and effect understanding, and descriptive language—all within seconds using the mobile app.

5. Color Mixing Ice Cubes

Supplies Needed:

• Ice cube trays
• Primary color food coloring (red, blue, yellow)
• Water
• Eyedroppers or pipettes
• White trays or plates

How to Do It:

1. Create colored ice cubes by adding food coloring to water before freezing
2. Prepare red, blue, and yellow ice cubes
3. Place cubes on white trays and allow children to observe as they melt
4. Watch colors mix where melting cubes touch each other

Educational Purpose: Children learn about how ice turns into water (melting) while also discovering what happens when different colors mix together. They practice color recognition, naming what new colors appear (red + blue = purple!) and use descriptive words to talk about what they see happening as the ice melts.

6. Sink or Float Water Investigation

Supplies Needed:

• Large clear container filled with water
• Collection of everyday objects (cork, rock, feather, coin, plastic toy, etc.)
• Chart paper for recording predictions
• Towels for spills

How to Do It:

1. Gather children around the water container
2. Show each object and ask them to predict: Will it sink or float?
3. Record predictions on a simple chart
4. Test each object and compare results to predictions
5. Discuss why some objects float while others sink

Educational Purpose: This activity helps children learn the difference between things that float and things that sink. They practice guessing what will happen before testing each object, which builds early science thinking skills. It’s also a great opportunity to introduce vocabulary like “float,” “sink,” “heavy,” and “light.”

7. Baking Soda Balloon Inflation

Supplies Needed:

• Empty water bottles
• Balloons
• Baking soda (2-3 tablespoons)
• Vinegar (¼ cup)
• Funnel

How to Do It:

1. Pour vinegar into the bottle
2. Using the funnel, pour baking soda into the uninflated balloon
3. Carefully stretch the balloon over the bottle opening (without dumping the baking soda yet)
4. Lift the balloon to release baking soda into the vinegar
5. Watch as the balloon inflates

Educational Purpose: This activity shows children that sometimes, when we mix things together, they create something invisible (air) that takes up space. Children see this happening as the balloon blows up “all by itself!” It builds on cause-and-effect understanding and helps children see that air is real even though we can’t see it.

8. Chromatography Butterfly Art

Supplies Needed:

• Coffee filters
• Washable markers
• Spray bottle with water
• Pipe cleaners
• Clothespins

How to Do It:

1. Have children color patterns on coffee filters with markers
2. Spray water onto the filters and watch colors separate and spread
3. Once dry, pinch filters in the middle and attach a pipe cleaner as the butterfly body
4. Use clothespins as stands to display the butterflies

Educational Purpose: This activity combines art and science as children discover that marker colors are actually made up of multiple colors that spread out when they get wet. It encourages creativity while teaching simple concepts about colors, mixing and separating. Children also get to practice fine motor skills while creating their beautiful butterfly art. This is a great opportunity to introduce basic butterfly science – talking about their life cycles, wing patterns, and how real butterflies get their colors from tiny scales on their wings.

More Hands-On Science Explorations for Young Learners

9. Growing Crystal Rainbows

Supplies Needed:

• Black construction paper
• Epsom salts (½ cup)
• Hot water (1 cup, teacher-handled)
• Food coloring
• Small containers
• Paintbrushes

How to Do It:

1. Mix Epsom salts with hot water until dissolved
2. Divide the mixture into small containers and add different food colors
3. Have children paint designs on black paper with the colored solutions
4. Set aside to dry completely (several hours or overnight)
5. Observe the crystal formations that appear as the water evaporates

Educational Purpose: Children are fascinated to see the sparkly crystals that “magically” appear as the water dries. This activity helps them understand that sometimes things we can’t see (salt dissolved in water) can become visible again through a simple process. It also encourages patience as they wait for results and develops descriptive language as they talk about the crystals’ appearance.

10. Rain Cloud in a Jar

Supplies Needed:

• Clear jar or glass
• Shaving cream (the foam type)
• Food coloring mixed with water
• Dropper or pipette
• Water

How to Do It:

1. Fill the jar ¾ full with water
2. Spray a layer of shaving cream on top to form a “cloud”
3. Mix food coloring with a small amount of water
4. Using droppers, add colored water to the top of the shaving cream
5. Watch as the color builds up and eventually “rains” through the cloud

Educational Purpose: This visual demonstration helps children understand rain in a way they can see and relate to. They learn that clouds hold water until they get too full, and then the water falls down as rain. It’s a concrete way to talk about weather and introduces simple weather vocabulary that children can use to describe their observations.

11. Magnetic Exploration Station

Supplies Needed:

• Various types of magnets
• Collection of magnetic and non-magnetic items
• Sorting trays
• Paper clips
• Metal shavings in sealed containers (optional)
• Magnetic wands

How to Do It:

1. Create a discovery station with various magnets and objects
2. Encourage children to test which items are attracted to magnets
3. Sort objects into “magnetic” and “non-magnetic” categories
4. Experiment with magnet strength using chains of paper clips
5. Observe magnetic fields using sealed containers of metal shavings

Educational Purpose: This hands-on exploration teaches children about magnets and what they stick to. Children practice sorting objects into “magnetic” and “not magnetic” groups, building early classification skills. They also develop vocabulary like “attract,” “pull,” and “stick” while discovering how magnets work through play.

12. Bubble Science

Supplies Needed:

• Bubble solution (dish soap, water, and a touch of glycerin)
• Various bubble wands and tools
• Straws (cut in half to prevent excessive suction)
• Pipe cleaners shaped into wands
• Cookie cutters as bubble frames
• Small kiddie pool or plastic tub (optional, for giant bubbles)

How to Do It:

1. Create different bubble solution stations
2. Provide various tools for making bubbles
3. Encourage children to test which tools make the biggest, smallest, or most bubbles
4. Try adding food coloring to bubbles for bubble prints
5. Experiment with ways to make bubbles last longer

Educational Purpose: Bubble play is not only fun but helps children develop breath control and fine motor skills. They learn shape recognition as they notice bubbles are always round, and they practice descriptive language to talk about what they see (“big bubble,” “tiny bubble,” “rainbow colors”). Bubbles also naturally encourage counting, comparing sizes, and tracking movement with eyes.

Bring the Joy of Scientific Discovery to Your Preschool Program

Science activities provide a unique combination of joy, wonder, and educational value that few other learning experiences can match. By incorporating these 12 simple experiments into your childcare routine, you’ll be fostering critical thinking skills, vocabulary development, and a lifelong love of learning.

Remember that young children learn best through hands-on experiences that engage multiple senses. These activities invite children to touch, see, hear, and sometimes even smell the science happening before their eyes. This multisensory approach ensures that concepts stick with children long after the experiment ends.

Want to wow parents with photos and updates of their little scientists in action? Try Daily Connect today and make science documentation effortless for your teaching team!

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