2nd - 4th Grade Science Activities : Page 3

This science fair project idea investigates which objects float and sink in honey, water, and oil.

In this activity, your child will be challenged to use simple materials to create a catapult for a small, lightweight toy.

How do you tell time without a watch? Use the sun! This simple activity will show your child how to build his own sundial.

Kids will make a beautiful rainbow in a jar and learn what enables different types of liquids to remain distinct in separate layers.

Do earthworms like moisture or darkness? Find out as we explore the relationship between earthworms and light.

Take advantage of the spring and summer sun in this arts and crafts activity that has your learner creating pretty flower prints.

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

In this fun science project, learn about what happens to cut fruit and experiment with how to stop apples from turning brown.

Is it solid or liquid? Create oobleck and witness the amazingly weird oscillation between the two!

How does a compass work? What's a magnetic field? Kids will build their own compass at home to find the answers in this great science fair project idea.

What's the quickest way to separate salt and pepper? Let static electricity do the work! Your child will be fascinated by this simple experiment.

How does smell affect taste? Ready your taste buds--in this project, you'll gather some test subjects and do a taste test to see how much smell affects taste.

This science fair project idea investigates emulsifiers that allow oil and vinegar to mix.

This science fair project idea develops an understanding through experimentation of which shapes are the most structurally strong.

In this activity, your child will be challenged to make a tower using paper cups.

Try this simple activity with your child to guesstimate the age of a tree in your yard and nurture her developing math skills while you're at it!

The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

Set your young chemist up for an afternoon of science-fueled magic with a deceptively simple activity starring baking soda and vinegar!

In this science fair project, kids will be able to see where germs reside on their hands while gaining insight into the benefits of thorough hand washing.

Encourage your child to think outside the bathtub by making her very own handmade soaps! Perfect as a present, a decoration, or just to pamper herself.

In this design challenge, your child will create a parachute for a small toy using typical household items.

Make edible amber fossils with your second grader to explore the fascinating world of science!

Why doesn't the ocean freeze? Students answer this question by simulating the chemical composition and temperature of arctic waters in their own home.

The concept of metamorphosis is fascinating to children of all ages. Help your child's creativity take flight as she makes her very own butterfly life cycle.

Students will investigate the thermal conductivity of metals by learning how to measure thermal conductivity with this fun and easy science fair project idea.

Certain fruits can change gelatinâs ability to set. In this experiment, kids will discover what happens when gelatin meets pineapple enzyme.

Inspire your child to put on her engineer hat for the day, as she builds her very own, double-decker bridge.

Learning about how plants grow is a building block in the early grades science curriculum. Put a fun twist on this life science concept with these cup monster friends!

Incorporate some math and science thinking into your annual fall fun with this pumpkin investigation activity! Your child will have a blast investigating various ways of measuring pumpkins, making estimates, taking measurements, and recording their findin

This science fair project idea measures out the sugar of various foods and find out whether people can correctly determine how much sugar is in common foods.