In this exciting and empowering challenge, your child will construct a bridge using marshmallows and toothpicks!

4th graders construct an ocean food web to learn about consumers and trophic levels, food webs, and food chains in this cool ecology science fair project.

How does distance affect the spreading of light? Kids see diffraction and the inverse square law of light in action with this great science fair project idea.

How do animals keep warm? In this experiment, find out whether fat insulation resists cold temperatures and learn how this works in the animal kingdom.

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

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

Your second grader will love this simple soda bottle race car activity. Make a ramp and customize your car for an entertaining way to learn scientific concepts.

This project is a vivid, concrete introduction to the basic but important idea that plants need sunlight and water to grow.

Check out this silly game that will put your kid's animal habitat knowledge (and acting skills) to the test.

In this science fair project, students create their own miniature salt flats at home.

Make a spring collage with your child to get them outside and those creative juices flowing!

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.

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.

Why doesn't the ocean freeze? Students answer this question by simulating the chemical composition and temperature of arctic waters in their own home.

This science fair project idea develops an understanding through experimentation of which shapes are the most structurally strong.

Here's a science experiment that gives your kids a chance to see how fire needs oxygen to burn, with a little math and writing practice thrown in.

Here's a great activity that uses corks and toothpicks to create a fleet of floating boats. Which design makes for the most seaworthy vessel?

This light bulb science project includes step-by-step instructions for testing the heat from different light bulbs.

Let your young scientist explore a brave new world of sound with an experiment that just requires a handful of common household items.

Demonstrate the properties of pressure and surface tension to explain how water can stay inside an upside down glass using cardboard.

In this science fair project, students discover how sedimentary layers form as sediments like mud, silt and sand settle over time.

The next time you've got a restless second grade earth scientist on your hands, use this experiment to demonstrate crystals and make a tasty treat, too!

Show your child the solar system and let them explore the stars and space by creating a painting. It's a fun and easy way capture your child's imagination.

You don't need to head to the Arctic to experiment with life in an igloo. Learners can build their own ice igloo at home from water and empty milk containers.

Let your fabulous crafter use their favorite flowers, fruits and herbs to whip up a delicious perfume that they can proudly present to a friend or a loved one.