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Use chemical analysis to identify a variety of mystery powders that look the same but actually have very different properties.

Most people assume that cold water freezes more quickly, but could that be false? Does hot water freeze faster than cold water? Let's find out!

Set off an a science adventure as you prepare a row of bee homes for your new visitors.

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

In this windmill model science project, you will build a windmill to learn about wheel-and-axle machines and how these simple machines are used to do work.

In this cool project, create a lighted, scale model of the different layers of the Sun, including the core, radiation and convection zones, and photosphere.

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

Did you even wonder why some rocks are round and smooth while others are broken up into small pieces?

Kids will create their own version of Richard Feynman's rubber band heat engine to learn about thermodynamics with this cool science fair project idea.

This science fair project idea measures the growth of bread dough and finds out how long it takes for the dough to stop rising.

The objective this science fair project is to determine whether a bigger bag will allow a homemade hot air balloon to fly higher than smaller bag.

Kids will learn how to measure the viscosity of liquids by making their own homemade viscometer in this great science fair project idea.

Do hand soaps and sanitizers prevent the growth of bread mold? If so, why? Kids will find out with this fun and informative science fair project idea.

This science fair project idea builds models of various types of bridges and then determines which bridge design is the strongest.

The goal of this project is to create an exciting topographical map out of dough.