Looking for exciting summer science experiments for kids? This collection includes hands-on science activities, STEM challenges, outdoor investigations, water experiments, chemistry projects, and engineering activities perfect for summer learning.
Whether you’re planning a summer camp week, filling a homeschool science notebook, or simply looking for fun ways to keep kids learning, you’ll find easy science experiments that explore chemistry, physics, earth science, biology, and engineering using simple supplies.
👉 Updated for Summer 2026. From bottle rockets and bubbles to solar ovens and strawberry DNA, these summer science activities make it easy to combine learning and play all season long.
🔥 Top 5 Must-Try Summer Science Experiments
Summer science experiments are hands-on activities that help kids explore chemistry, physics, biology, earth science, and engineering through fun seasonal projects. From bottle rockets and solar ovens to bubbles, ice investigations, and water science, these summer science activities make learning exciting while encouraging curiosity and problem-solving skills.
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- Ice Cream in a Bag – Make a tasty treat while learning about freezing point depression.
- Water Bottle Rocket – A fantastic, flying experiment that explores pressure and propulsion.
- DIY Solar Oven – Harness the sun’s energy to melt s’mores in a homemade solar cooker.
- Mentos and Diet Coke: Explore a unique physical change with a jaw-dropping eruption.
- Strawberry DNA – Extract real DNA from strawberries using simple kitchen supplies.
Summer Observations
Kick off the summer science fun with this easy-to-use summer observations worksheet! Perfect for getting kids thinking about the summer ahead.
Free Summer Science Starter Guide
Want an easy way to turn summer activities into real science investigations? Download our free Summer Science Starter Guide filled with science planning pages, observation sheets, STEM challenge ideas, and printable notebook pages that help kids think like scientists while they explore.
Inside you’ll find:
- Summer science experiment ideas
- Science investigation planner pages
- Observation journal sheets
- STEM challenge prompts
- Engineering design pages
Perfect for summer learning, homeschool science, science camps, or rainy-day STEM fun.
Cool Chemistry Experiments
Explore chemical reactions, fizz, and fun with these easy chemistry experiments for summer!
- Fizzing Lemonade – Explore acids and bases with this tasty, bubbly experiment.
- Frozen Baking Soda Stars – A fun patriotic activity where frozen stars fizz and bubble with vinegar.
- Bursting Bags (Exploding Bags) – Mix baking soda and vinegar in a sealed bag for an exciting pop!
- Alka-Seltzer Rockets – Watch a gas build-up launch film canister rockets into the air.
- Watermelon Volcano – Create a foaming eruption inside a watermelon!
- Sandbox Volcano – Build and erupt a volcano using baking soda and vinegar in your sandbox.
- Fireworks in a Jar – Mix oil and water with food coloring to create colorful bursts like fireworks.
- Crystal Seashells – Grow borax crystals on seashells and explore solutions and crystal formation.
Physical Science & Electricity Experiments
- DIY Flashlight – Build a simple flashlight and learn how circuits work.
- Static Lightning – Create tiny sparks with a balloon and a spoon to explore static electricity.
- Balloon Rocket – Use air pressure to launch a balloon along a string path.
- Pulley System – Build a simple pulley to learn how machines lift objects.
- Straw Rocket – Blow through a straw to launch a paper rocket using force and air.
- Floating Paper Clip – Test the water’s surface tension by floating a paper clip.
- Magnet Maze – Move a metal object through a maze using magnetic force.
- Paper Helicopter Spinner Drop – Drop a paper helicopter to explore gravity and air resistance.
- Ball Ramp Challenge – Test how slope and surface affect a rolling ball’s speed..
Water & Ice Science Activities
Beat the heat and learn about melting, freezing, and water reactions!
- Ice Cream in a Bag – Make a frozen treat while learning about freezing points.
- Slushie Sorbet in a Bag – Explore how salt lowers the freezing point of ice.
- Salt Water Density – Test how saltwater affects floating and sinking objects.
- Ice Melting Experiments – See how different materials melt ice at different rates.
- Leakproof Bag – Stick pencils through a water-filled bag without it leaking.
- DIY Water Wall – Build a simple wall to explore water flow and gravity.
- LEGO Water Dam – Use LEGO bricks to block or control the water flow.
- Bubble Snakes – Explore air flow and surface tension.
- Geometric Bubbles – Discover how bubbles form in different frames.
Light, Color, and UV Science
Discover the science of light, UV rays, and color change with these vibrant activities.
- Ultraviolet (UV) Slime – Take slime outside to explore UV-triggered color changes.
- Thermochromatic Slime– Make slime that changes color in different temperatures.
- Homemade Kaleidoscope – Create colorful patterns with light and reflection.
- DIY Spectroscope – Split white light into a rainbow using a simple tool.
- What Melts in the Sun? – Test how heat from sunlight melts different materials.
- DIY Planetarium – Model stars and constellations with a homemade projector.
- DIY Sundial – Track the sun’s movement by making a sundial that tells time with shadows.
- Pinhole Camera – Make a simple camera to explore how light travels and creates images.
Summer STEM & Building Projects
Build, design, and engineer your way through the summer with these hands-on STEM challenges.
- Paper Bridge Challenge – Build a bridge from paper and test how much weight it can hold.
- Paddle Boat Challenge – Create a rubber band-powered boat and see how far it can travel.
- LEGO Zip Line – Build a zip line for a mini figure and experiment with speed and weight.
- Marshmallow Spaghetti Tower – Engineer a tall tower using only marshmallows and dry spaghetti.
- Soap-Powered Boat – Use surface tension and dish soap to power a simple paper boat.
- DIY Pinwheel – Make a pinwheel and explore wind power and rotational motion.
- Straw Boat – Design a floating boat from straws and test how much weight it can carry.
Make It a Summer Science Investigation
Turn any of these summer science activities into a simple science investigation!
Start by asking a question. What do you think will happen? Then make a prediction, test your idea, and record your observations.
Try changing one thing and comparing the results. For example:
- Which material melts ice the fastest?
- Does adding more salt change how quickly a slushie forms?
- Which balloon rocket travels the farthest?
- What happens when you change the amount of baking soda in a reaction?
Encouraging kids to ask questions, collect data, and draw conclusions helps build critical thinking skills while making science even more meaningful.
👉 Grab our free Summer Science Starter Guide here for printable investigation pages, observation sheets, and STEM planning tools.
Summer Science Favorites
- Outdoor Science Activities for Kids
- Ocean Activities for Kids
- 4th of July Science Experiments
- Space Science Activities
Summer Science Camps & Labs
Summer STEM Challenges
Make Summer STEM a Blast!
From slime and bubbles to nature walks and camp weeks—this Summer bundle is your one-stop summer STEM solution. Over 11 hands-on activity packs to make this your most fun and educational summer ever!
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