In this exciting design challenge, your child will use design thinking skills to create a mixture that can inflate a balloon.

Challenge your learner to design and build a city of their own in this creative engineering activity.

Science fair project in which you will examine how crystals are formed by creating your own crystal using charcoal briquettes, salt, and ammonia.

In this science and engineering activity, children will explore types of tunnels and their purposes and then design and build a tunnel of their own.

In this outdoor science activity you'll find tips on how to create a nature journal by choosing a native plant or animal and tracking that species.

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 design challenge, your child will create a parachute for a small toy using typical household items.

Learn about where colors come from and how light absorption works in this fun experiment! All you need is a flashlight, construction paper, and cellophane!

In this activity your child will create their very own marble maze!

In this simple science project, learn about what causes dew and what affects dew formation with a drinking glass, ice, and a soda bottle.

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

Discover how and which salt melts ice the quickest.

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

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

What heats up fasterâwater or soil? 5th grade students test the specific heat of water against the specific heat of sand in this great science fair project.

With this hands-on activity, you'll show how fall colors are hidden in the leaf all year long!

What causes the seasons to change? Kids find out by modeling the earth's tilt using a globe, flashlight and graph paper in this cool science fair project idea.

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

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

Make some easy homemade yogurt with your young scientist, and see what a few 'live' bacteria can do in the right conditions!

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

Help your fifth grader trace your family's roots and interview all the living mothers to create a makeshift, 3-D family tree!

Grow borax crystals and get your child excited about Earth science with this crafty science experiment.