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.

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

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.

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.

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.

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

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

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!

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.

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

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

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.

Let your young scientist explore a brave new world of sound with an experiment that just requires a handful of common household items.

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

This science fair project creates a visual model of whatâs happening to sound waves as a car approaches and then leaves.

In this physics project, learn about the relationship between light intensity and distance using a laser pointer, flashlight, and graph paper!

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!

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.

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

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

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

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

Show your kids the power of baking powder by conducting a simple experiment. Make four batches of cornbread, all identical except for one thing: baking powder!

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

This science fair project idea produces varying pitches of sound.

Try the classic balloon-on-the-wall trick with your kid and watch static electricity in action.

Check out this mind-blowing experiment in which a hard-boiled egg will fit through an impossibly small opening with the help of only a few matches!

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