How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

Science fair project that determines the relationship between the temperature and the rate of cricket chirping. How many times do crickets chirp each minute?

What is the hydrologic cycle and how does it work? Check out this fun and easy science project where you will model and learn about Earth's water cycle!

This science fair project explores discover whether the acidity of sour candy is comparable to that of battery acid.

Students explore hot desert plant adaptations in this cool science fair project by observing how these organisms prevent excessive transpiration.

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

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

Kids will learn how to clean fish tank the natural way. Add catfish to the tank and see if your water gets cleaner.

This science fair project idea determines what household items are good conductors of electricity.

With this science fair idea, little scientists will gain valuable insights into the physics behind throwing a baseball.

This experiment will explore the possibility of creating an infinite object by hand.

This science fair project idea demonstrates that light travels in straight lines and experiments with reflecting light.

This science experiment has students test whether a snail moves faster on concrete or dirt.

This science fair project idea explores whether mint, known for its âcooling sensationâ really does lower temperatures.

In this project, you will observe and record changes in sunspots over two weeks.

Why does purple cheese look nasty? Because color plays a big part in how we perceive the taste of different foods. Are birds just like us in this respect?

Wiggly worms are known for staying buried in the soil, but how does that affect plants? Are earthworms and plant growth related?

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

This project compares different liquids and the freezing, melting and boiling points of liquids.

Check out this fun science project idea to measure the amount of vitamin C in ripe, half-ripe, unripe and stored oranges.

This science fair project on testing water hardness is a great introduction to practical chemistry. Test and learn the difference between hard and soft water.

This science fair project idea determines exactly how much of an effect road grade has upon a cyclistâs speed.

This science fair project idea attempts to train a worm to complete a simple maze in order to find out if worms can learn and remember.

This fun science fair project idea explains what a circadian rhythm is and explores the types of biological activities that follow a 24 hour cycle in mammals.

Are red apples really sweeter than green apples? The objective of this science fair project is to test the theory with quantitative evidence.

Prove that the Earth is not flat. The objective of this science fair project is to measure the angle of the sun and calculate the circumference of the Earth.

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

This science fair project idea examines whether people can decode scrambled messages.

In this science fair project, learn how a mineral streak is made and how it can help identify an unknown mineral.

What is condensation? Little mad scientists will learn about condensation, states of matter, and air pressure by conducting this cool science experiment.