3rd - 5th 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.

Little scientists will make inferences about hearing loss, pitch, and frequency in this great science fair idea that puts the human ear to the test.

Sink or swim? Calculate the density of various fruits and vegetables using water and a kitchen scale.

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

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

Here's an experiment that will have your child experimenting with cake ingredients to learn about the chemical reactions that happen when a cake's in the oven.

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

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

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

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!

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

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!

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

How do series and parallel circuits work, and which produces the brightest light in a light bulb? Construct both in this project and find out!

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

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

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

On the next chilly, winter day, invite your fifth grader to make a hand warmer by experimenting with the loaded combination of a few natural ingredients.

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

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.

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

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

This science fair project idea produces varying pitches of sound.

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 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 experiment uses a yeast solution, liquid detergent, and hydrogen peroxide to produce an exciting reaction like no other!

A homemade lava lamp gives any room a retro flair. Find out how to make a homemade lava lamp, and learn some science too, with this educational activity.

Learn with makes water molecules work with this fun and easy science activity!

This science fair project demonstrates the principles of reflection through simple experiments involving mirrors and light.