Kindergarten - 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.

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

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

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

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

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

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

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!

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

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

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

This easy Halloween-themed science experiment for first-graders is perfect for chilly October afternoons or great as a Halloween party activity.

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

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

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.

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.

Introduce your child to the world of motion and physics with a bit of marble play inspired by Sir Isaac Newton!

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

This homemade parachute toy is incredibly easy to build. Plus, it gives kids an excuse to investigate and experiment...the backbone of kindergarten science.

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

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

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

In this science fair project, young children discover what happens when two fluids that have different densities get together.

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.

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

How sensitive is your skin? Here's a fourth grade science experiment that lets your child figure it out.

Here's a fun math and science activity: help your child explore four different kinds of measurement, using their hand and a few simple household tools.