In this science fair project, kids start a chemical reaction that will make a balloon inflate itself!

In this challenge, students are tasked with creating a car that can be powered by a balloon!

In this challenge, students are tasked with creating a model roller coaster that a marble can travel through.

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

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

This project examines Newton's First and Second Laws of Motion with a bicycle and water balloons.

Science fair project the demonstrates Newton's Third Law using a milk carton filled with water.

Kids will conduct a cool limewater carbon dioxide test that can be performed with common household materials to learn about the chemistry of this common gas.

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

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

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

What is elasticity? Students will investigate how this concept applies to bouncing ball physics by testing the bounces of balls made out of different materials.

This is a quick, easy science fair project that conveys the idea of density to upper elementary students.

Students pit the heat capacity of water against the heat capacity of oil while looking at the effects of dipole rotation in this cool science fair project idea.

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 rust form? Kids will learn about the roles oxygen, water, and electrons play in rust chemistry in this cool science fair project idea.

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 experiments with spinning color wheels and optical illusions.

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!

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

Teach your child some scientific basics as you explore the densities of various liquids in this fun experiment.

This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.

Teach your child how butter is created by shaking up cream the old-fashioned way.

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!

Want to make Halloween truly eerie? Science to the rescue! These ghouly hands come alive with a little help from simple chemistry.

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

Get your hands on a concoction that breaks the rules about what's a solid and what's a liquid.

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

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

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