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

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

Saturn is the ringed planet in our solar system, a gas giant with rings made of ice and dust. Let's make a cool scale model with an old CD and some glitter!

What is topography? Kids find out by learning to make and read a topographic map in this awesome science fair project idea.

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

Take a dive into the candy jar with this yummy science experiment.

Test out the pH levels of soil in your backyard versus soil in more wild environments to solve this science case.

This science project uses Mohsâ Hardness Test to show kids how to compare the hardness of different types of minerals.

The objective of this science fair project is to explore the relationship between acidic and basic compounds.

In this experiment, the weight of aluminum cans will be compared.

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

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.

In this experiment you will replicate the mummification process by making a hot dog mummy.

The project determines which type of birds prefer which type of birdseed.

This science fair project idea measures out the sugar of various foods and find out whether people can correctly determine how much sugar is in common foods.

This science fair project will help students learn about non-vascular plants, such as mosses.

In this plastic wrap science fair project, you'll learn about polymer permeability and find out which plastic wrap keeps food from dehydrating best.

The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

This science project has students collect wood samples and invent new uses for different types of wood based on its properties.

This project tests the hypothesis that dark colors absorb more heat than light colors.

This project determines what category of person is most likely to be ticklish.

Learn about sound physics and do a survey experiment to explore the difference between sound and noise in this science project.

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

The purpose of this science fair project is to determine which conditions and materials quicken the composting process to make the best compost.

This science fair project focuses on a polymer called hydrogel super absorbent crystal which absorbs water, swelling to many times its original size.

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

Have you ever noticed the way a dropped stone makes a fun pattern in a pond or lake? What's the science behind these splashy occurrences?

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

Demonstrate how you can make your own compass using a magnetized needle. It also allows you to compare magnetic north and geographic north.

Learn how to tell time by the sun with this cool science fair project idea that tracks how the accuracy of a sundial changes over time.