2nd - 4th Grade Physical Science Activities

Explore scientific concepts with this experiment that introduces kids to the scientific method!

This science fair project idea experiments with spinning color wheels and optical illusions.

In this Halloween-themed activity, young learners will find out what happens when they mix two household items together to create a surprising chemical reaction.

These flying potato poppers make a cool sound, create a celebratory mood, and they can teach your child about the power of air pressure.

In this fun science fair project idea learn about universal solvents and solutes and find out the solubility of several common liquid substances.

Help your fifth grader execute this experiment involving a lit candle (submerged in water!) to show him the wonders of heat energy transference.

This science fair project idea explores whether talking to a plant will help it grow.

This taste buds science experiment demonstrates how strongly our sense of smell controls what we taste.

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

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

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.

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!

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.

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

Children combine an acid and an alkaline substance to simulate a volcano eruption in this fun experiment.

Your kid can learn about the process of making frozen yogurt and enjoy a homemade, flavorful dessert. Experiment with this fun, chilly food!

The pinwheel is a simple toy that has been around for years and uses the wonders of the wind to spin it and delight kids of all ages!

What causes sound? Here's a simple science experiment that adds a visual element to the science of sound to help kids better understand this tricky concept.

This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.

This simple "how to make a water wheel" activity makes physics come alive for your child by demonstrating how different kinds of energy work.

What's a liquid? What's a solid? What better way to experiment than by turning a childhood favorite, ice cream, into a homemade science lesson!

Your child will do a fun science experiment using soap and pepper flakes to help understand the concepts of water molecules and the surface tension of water.

In this sound experiment children listen for differences as they tap on a bag of air, a bag of water, and a wooden block held up to their ears.

How powerful is the reaction between baking soda and vinegar? Find out here!

Here's a classic celery science experiment that uses celery and food coloring to demonstrate how plants absorb water.

Let your fourth grade chef mix up butter and sugar with scientific principles about different states of matter, and get delicious toffee, too.

How does the size of a vibrating surface affect the pitch of a drum? Learn about drum size and pitch with this easy science fair project idea.

Help your curious third grader construct a dazzling spinning wheel that will teach him about the science behind colors while providing some silly entertainment!

In this activity, you'll not only make your own bouncy balls at home, but your child will also learn how polymers are made.