Kids will learn how to make a thermometer to to explore liquid density in this great science fair project. Which liquids are affected by temperature the most?

Can you fool your eyes and your brain with an optical illusion? The purpose of this science fair project is to demonstrate various kinds of optical illusions.

Kids will make a beautiful rainbow in a jar and learn what enables different types of liquids to remain distinct in separate layers.

In this project, create and examine garden mulch to find out what critters live in the messy, muddy layers just above the soil.

In this cool science experiment, learn about magnetism and poles, and test magnet strength to find out if two magnets are twice as strong as one.

In this project, learn about animal vision and different kinds of eyes: ocelli, compound eyes, and camera eyes. Find out what a jellyfish or grasshopper sees!

This science fair project idea studies whether eating a hearty breakfast before and exam will get them better test scores.

Plants and light seem to be good buddies, but how far does the friendship really go?

The objective of this science fair project is to determine whether planaria reproduce asexually by regeneration.

Consult astronomers for opinions and advice. Devise a mathematical argument regarding the probability of other planets supporting extra-terrestrial life.

This science project has students study a group of volunteer liars actively lying to study the behavior of a lie. Students see if they can figure out the truth.

Will increasing the amount of salt in water effect how slow or fast the water freezes?

Discover whether the color of text correlates with ease and speed of reading.

Could there be toxic chemicals lurking in the cupboards and closets of your home?

The buoyant force of water explains why some objects float in water. But why do some objects sink? Find out in this physics experiment and learn about density.

Sure, you already know that water is made up of hydrogen and oxygen, but did you know that oxygen levels differ in different types of water?

Discover which battery composition (type) lasts the longest.

This experiment investigates whether the psychological phenomenon of the halo effect can be used to explain people's perceptions of others.

Learn about the power of exponents. The objective of this science fair project is to explore and understand how exponents are used.

This experiment evaluates whether a person's eye color affects their ability to identify colors in low light.

How greasy are your potato chips? Students will use a reliable method to quantify greasiness and compare different brands in this great science fair project.

This science fair project idea explores discover whether there are any patterns or trends in the memories between different genders.

Kids build a rainforest food web to explore trophic levels in this cool science fair project for 4th grade.

What if the shape of the Earth weren't spherical? How does its shape affect our gravity, climate, and tides? Model these questions in this cool project!

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.

Learn about magnifying glasses, concave lenses and inverted images by sending rays of light through a magnifying glass in this cool science fair project!

Handedness and footedness refer to whether people prefer to use their left or right hand and foot. In this experiment, test hand and foot dominance.

This interactive project invites science fair-goers to participate in examination and recording to demonstrate the importance of firsthand observation.

How can we describe the relationship of magnetic field strength vs. distance? Kids will find out with this free science fair project idea.

This science fair project idea explores if objects dropped from a high distance will equal a greater impact force than the object dropped from a low distance.