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

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

Kids get step-by-step instructions for how to make a rubber band car and explore the physics of potential energy with this fun engineering science fair project.

This project compares the strength of one, two, and three-ply toilet paper.

This science fair project compares the allelopathic affects of juglone, a chemical agent produced by the Black Walnut tree, on two plants.

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

Show your fifth grade scientist how to create a siphon using two buckets, plastic tubing, and water. Watch her astonishment as the water travels uphill!

In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

Show your kids the power of baking powder by conducting a simple experiment. Make four batches of cornbread, all identical except for one thing: baking powder!

Science fair project which determines whether it is numerically possible to be connected to every person on the earth within six degrees of separation.

Here's a fun activity that will have your child researching, collecting, and charting plant specimens from the neighborhood.

Is your child a young ornithologist in the making?

Science fair project that examines how to grow bacteria in a controlled setting, using simple materials from around the home.

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

Demonstrate how to tell the age of an egg without having to crack it open.

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

Science fair project that helps you better understand density by comparing the relative densities of cans of Coke and Diet Coke.

Science fair project which uses coins flips to visually demonstrate the probability of an event and how to express it.

In this science fair project, students will create a model of a shoreline, observe erosion and examine how jetties prevent erosion.

This kinesthetic learning activity will help your fourth grader get a firm grasp on the immensity of the solar system.

Check out this science project idea to compare organic produce to non-organic produce and how preservatives in food extend the shelf life of goods.

This science fair project idea investigates how the shape of an object affects drag.

Inspire your child to put on her engineer hat for the day, as she builds her very own, double-decker bridge.

This science fair project idea investigates if webbed feet help a duck (and others) swim.

Science fair project that examines the behavior of water and gravel in creek beds and the formation of sedimentary rocks.

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

This science fair project idea explores how length affects the weight a bridge can hold.

By using static electricity generated from their body, a child can cause a small fluorescent lamp bulb to light up!

Do plants breathe? Not exactly. They do respire though! This activity will help your child with see that plants are producing the oxygen we need to survive.

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.