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What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

Why doesn't the ocean freeze? Students answer this question by simulating the chemical composition and temperature of arctic waters in their own home.

In this experiment, students find out what happens when a less-dense fluid interacts with a denser one, replicating the effect of cooler solid rock on magma.

Climates with more snowfall have more coniferous forests and fewer deciduous ? Learn about how pine trees in a coniferous forest adapted to withstand snow.

This science fair project idea identifies trees using a dichotomous key.

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

Learn about sound physics and do a survey experiment to explore the difference between sound and noise in this science project.

How does distance affect the spreading of light? Kids see diffraction and the inverse square law of light in action with this great science fair project idea.

This science fair project teaches about mold. Students will test different foods to see which grow mold the fastest.

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

Do you love to make Jell-O? Find out in this science fair project idea if it is possible to make Jell-O with just warm water.

This experiment explores whether reading text on a computer screen or type on paper leads to better retention of the information read.

This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.

Marshmallows are made of sugar, water, and air pockets. Since the marshmallow is flexible, will air pressure cause it to expand when heated in a microwave?

Learn all about balance and motion as your child designs a corn maze!

This science fair project demonstrates the magic of arches by challenging students to stack telephone books on top of eggs without breaking them.

What is persistence of vision? With this hands-on science fair project idea, students will demonstrate this cool and dramatic phenomenon in their own classroom.

Develop your child's mathematical and engineering skills with this fun building brick challenge. In this activity, your learner will be challenged to create a boat out of building bricks.

Science fair project that determines whether tapping a pomegranate with a spoon helps it release its seeds.

Before you get ready for a delicious scramble or omelet, add a bit of science to your morning routine!

Science fair project that examines the different types of precipitation, evaluates the density of snow and calculates the ratio of snow-to-liquid.

What is a compound microscope? Kids find out by making one of their own in this cool science fair project.

In this free science fair project idea, we learn about surface tension and how it can support mass—in this case, a floating paper clip.

In this science fair project, students examine under what conditions individual plants release seeds and how far the seeds are released.

Cherries usually burst with flavor, but in this science experiment they burst with osmotic pressure. This science activity will blow your curious kid's mind!

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.

Have you ever noticed the way a dropped stone makes a fun pattern in a pond or lake? What's the science behind these splashy occurrences?

Kids will make predictions about cricket behavior by conducting this fun and easy experiment which simulates different environments for crickets.

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

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.