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

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

This science fair project idea examines liquids of different densities.

This science fair project idea produces varying pitches of sound.

Determine whether butterflies like to drink sugar water, salt water, or plain water.

This science fair project idea examines whether the colors of the spectrum respond differently in the thermal aspect when radiated by the sun.

Soil and energy don't go together, right? That would be as bizarre as a pairing of peanut butter and marshmallows! Well, actually...

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

Kids will learn how to make a steam powered rocket boat, also called a putt putt boat or a pop pop boat, in this great science fair project for 4th graders.

Have you ever wondered how many numbers most people can memorize? Test your friends to find out!

How do organic materials become soil? This science experiment measures what materials biodegrade.

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

What's the best way to make DIY compost? Kids will learn about aerobic and anaerobic decomposition while learning to appreciate the value of composting.

Young scientists will investigate people's preferences for saltiness, and make some inferences about genetics and diet.

Science fair project which determines whether the size or the thickness of a piece of paper has an effect on how many times it can be folded in half.

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

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.

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

Test whether plants can grow without sunlight and water.

Does skin thickness really decrease fruit spoilage? Find out in this science fair project idea!

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

This project examines whether people's taste perception is influenced by what they see.

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

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

Word color association is just a fancy way to talk about the way we connect colors with words.

Have you ever seen fruit decay? Find out if a fruit will rot faster if you open it versus leaving it untouched!

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

What combination of cloth and stain will be the easiest for removing stains? Test and experiment!

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

The project investigates the affect music has on plant growth while experimenting with rock, classical and no music.