Is it amplitude? Weight? Length of string? Kids will discover what factors changing the period of a pendulum depends on in this fun and easy physics experiment.

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.

Future engineers, unite! Discover how to keep a sandcastleâs bridge from falling into the moat.

This fun and easy middle school science fair project idea explores the topic of pollution and demonstrates if polluted soil affect the growth of green plants.

This project investigates the affect of storage temperature on microwave popcorn.

This science fair project idea explores how the shape of a boat affects its density and how much weight it can float.

In this cool science fair project idea, kids conduct the ruler drop test on volunteers to determine whether reaction time can be improved with practice.

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

Learn how to demagnetize a magnet and how physics can explain this phenomenon with this enlightening science fair project.

What's the difference between a microwave and an oven? Use mashed potatoes to explore which kitchen appliance does a better job at keeping food warm.

This science project lets students explore the number of spots on a ladybird and how to treat ladybugs with respect.

Construct and experiment with a periscope using reflected light rays to gather an image.

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

In this experiment you observe and determine how well your cat uses his whiskers to navigate through a maze.

Find out whether putting something on top of a plant will inhibit its growth.

This project examines whether playing music during class helps students learn or if it distracts students from learning.

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

This science fair project idea researches how your choice of clothing affect how hot or cool you feel during the day.

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

The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.

How well can people recall what they have observed. Test your knowledge in this fun experiment.

Can you plant the insect-attracting borage plant to increase the amount of beneficial insects in your garden? Find out in this experiment!

Discover how and which salt melts ice the quickest.

The goal of this science fair project is to analyze differences between the taste and texture of frozen and fresh food.

What does a raindrop look like when it splashes on the ground? Is each raindrop unique like snowflakes? Find out how raindrop size varies in this experiment.

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

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 idea examines whether boys and girls differ in reflexes.

This science fair project idea examines liquids of different densities.

This science fair project idea discovers whether there are some objects that do not fall at a constant rate.