4th graders construct an ocean food web to learn about consumers and trophic levels, food webs, and food chains in this cool ecology science fair project.

In this experiment, you'll make a seafloor spreading model to learn more about how plate tectonics work and create mid-ocean ridges.

In this project, you'll build a model of the earth, complete with all seven continents and four major oceans.

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

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

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

Kids explore how a single movable pulley can confer a mechanical advantage over a fixed pulley in this cool engineering science fair project for 2nd grade.

Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

This science fair project idea compares biodiversity between drops of water.

This science fair project idea investigates how a bottom keel helps keep a boat from rocking back and forth.

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

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

This science fair project looks one of the most important factors affecting seed germination: water. A fun and easy plant biology experiment for 3rd graders.

The objective of this science fair project is to analyze the effects of salinity and temperature on water.

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.

Science fair project which determines if plants really do need water to grow, or whether they just need to be kept wet.

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

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

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

This project examines if computer screen and text color affect retention and if people subconsciously prefer combinations of colors that help their retention.

What animals are most popular? This project affords practice in data-collection, record-keeping and data-analysis through the investigation of this question.

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

In this project children practice the scientific method while playing with puffy paint.

This project explores whether plants can live and grow when "watered" with juice, soda, or milk.

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

Have you ever noticed the ridges on a dog's nose? In this project, we take several dogs' nose prints and discover just how unique they are!

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

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?

This project investigates the affect of storage temperature on microwave popcorn.