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.

Kids build a desert food chain, desert food web, and desert food pyramid in this cool science fair project to learn about trophic levels and consumers.

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

In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

Roasting pumpkin seeds makes for a great Halloween activity, and a healthy snack!

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

Learners hypothesize about and experiment with soil erosion in this hands-on activity.

Check out this fun science fair project to make a vinegar and baking soda balloon and demonstrate how gas is created as a result of the chemical reaction.

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

This science fair project idea examines which type of insulation holds in the most heat.

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

The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.

In this science fair project, students create their own miniature salt flats at home.

The objective of this science fair project is to examine the basic principles of air pressure using simple materials like a balloon, straw and string.

Magnets vary in strength. Have your young scientist figure out which kind of magnet is the strongest when you have him conduct this attractive experiment.

This science fair project creates a visual model of whatâs happening to sound waves as a car approaches and then leaves.

In this experiment, young ecologists will learn about a type of edge effect: how trees and plants at the edge of a forest can act as a weed filter.

This science fair project teaches students about wilting and browning of salad greens.

In this science fair project, students make their own rain gauge to measure rainfall.

Check out this cool science project idea to learn about rocks and explore the cycles of formation, breakdown, and reformation of rocks in the Earth's crust.

Demonstrate how static electricity can cause an object to move. It also examines just how an object affected by static electricity will move.

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

Observe corn seed germination to learn about dicots and monocots and how plants grow from seeds to seedlings to full-grown plants!

Show your child that the simplest ingredients (salt and water) can be used to illustrate the concept of density!

This science fair project idea investigates whether plants can survive being frozen.

This science fair project idea explores substances that cause a bubble to last longer.

Did you ever add salt to pasta? Did it help cook the pasta faster? If not, find out in this science fair project idea.

Making your own glass cleaner is easy, effective and inexpensive!

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

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