It's not actually that hard to get energy from garbage! Kids learn how to make biogas in the form of methane with this cool and easy science fair project idea.

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

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

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

The purpose of this study is to determine if people can tell the difference between organic and conventional food from looking at, smelling and tasting it.

This experiment examines whether storing your orange juice at different temperatures affects its acidity.

Science fair project in which you will learn more about the natural world by preserving and identifying different animal tracks.

This study evaluates if electronic devices commonly found in most households emit radiation, and if they do, how much?

This science fair project idea provides evidence that air is everywhere and takes up space.

Science fair project that compares the freezing temperature of salt water and freshwater in order to learn about supercooling and condensation nuclei.

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

In this open-ended activity, students will be given a small quantity of three types of materials and asked to design a prototype for “something that will improve the school.”

What are the effects of fertilizer on plant growth? What's the best fertilizer type (solid, liquid or powder)? Kids find out in this science fair project idea.

This science fair project idea produces varying pitches of sound.

In this cool experiment, learn how to find specific gravity of minerals using liquids of different densities to see which substances and items sink and float.

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

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 science fair project idea examines whether adding gelatin causes a solid to have a higher melting point and/or melt slower.

Which music genres have the fastest tempos? The slowest? This experiment determines if there's a relationship between beats per minute in a song and its genre.

This science fair project idea explores if the length of the string that an object is suspended on has an effect on how fast or slow it swings.

This fun experiment provides a concrete and visually striking illustration of photosynthesis.

This science fair project examines how tsunamis travel by simulating a tsunami moving around an island. You will generate a pretend tsunami in a swimming pool.

This science fair project uses paper chromatography to investigate whether black, brown, orange, and purple are pure colors or mixtures of other colors.

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

Science fair project which tests various sedimentary, igneous and metamorphic rocks to find out whether one rock family is stronger than the others.

Find out whether a longer airplane will fly farther or a wider paper airplane.

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

Does your middle school teenager have good reflexes? Gauge his reaction time in this science and math activity that requires only a yardstick and a friend.

Ever wonder why refrigerator lights turn off when you close the door? Does the darkness prevent food from spoiling? This experiment, determines just that.