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.

Why do ants like sugar? Do ants like artificial sweeteners too? Kids find out with this great inquiry-based science fair project.

Help your child learn about animal classification with this fun and delicious activity.

This science project challenges students to study deer behavior in their natural habitat- the feeding patterns, social behaviors, male to female ratio, etc.

Kids explore how a single movable pulley can confer a mechanical advantage over a fixed pulley in this cool engineering science fair project for 2nd grade.

This science fair project idea explores the different properties of matter.

How do you tell time without a watch? Use the sun! This simple activity will show your child how to build his own sundial.

This science project challenges students to learn about and classify weeds and discover new practical uses for weeds.

How do mirrors work? What is light, and how does it travel? Explore light and reflection with your preschooler with these simple hands-on experiments.

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 builds models of various types of bridges and then determines which bridge design is the strongest.

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

The objective of this science fair project is to study the photosynthesis process and demonstrate the important role that leaves play in the process.

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

In this science fair project, we learn how air molecules move as a result of density, convection, and air currents.

Will potatoes spud or sprout faster in dry, dark, or cold conditions? Find out in this science fair project idea!

In this science experiment, do tensile strength test on fishing line, a strand of hair, a rubber band, and any other materials you're curious about!

Is your child a nature nut with an eye for creative, green-friendly projects? Introduce them to this amazing DIY bird feeder!

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

This simple experiment serves as an introduction to the greenhouse effect.

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

This science fair project idea experiments with spinning color wheels and optical illusions.

What's the relationship between temperature, air humidity and static electricity? Kids will find out with this free static electricity science fair project.

How to test for acids and bases? In this activity you and your child can make your own indicator from red cabbage!

This science fair project explains the process of how the lungs expand and contract with the help of the diaphragm.

Students will investigate the thermal conductivity of metals by learning how to measure thermal conductivity with this fun and easy science fair project idea.

Find out which type of sponge holds the most water.

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

This science fair project idea investigates emulsifiers that allow oil and vinegar to mix.

Kids will learn how to make a steam powered rocket boat, also called a putt putt boat or a pop pop boat, in this great science fair project for 4th graders.