Boost your preschooler's attention to detail by getting her to explore the differences between two different pumpkins: large and small.

How does a flashlight work? Kids will make a complete circuit and explore how voltage contributes to brightness with this science fair project idea.

In almost every preschool classroom is a sensory table. Learn how to make one at home!

In this science fair project, young children discover what happens when two fluids that have different densities get together.

Kids construct a single fixed pulley system to learn how pulleys can make work easier in this cool physics and engineering science fair project idea.

Here is a kindergarten activity that blends art and science by using magnets, paint, and objects found around the house to create a picture.

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

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

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.

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

In this activity, you child will learn about how heat changes food. On the next sunny day, head outdoors to make a treat in an outside oven! Here's how:

Science fair project that examines the behavior of water and gravel in creek beds and the formation of sedimentary rocks.

Do you think you can blow down a sand castle with a mighty wind? Find out which material stands up best to erosion in this erosion experiment.

This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.

This science fair project idea determines which method of hand cleansing is the most effective.

Learn whether Mylar Balloons last longer than Latex Balloons or vice versa.

This classic children's game demonstrates how sound travels through air vs. through a solid.

How does frost form? How fast does it form? Do this simple science project using a plastic glass, rock salt and some water to learn about deposition.

How do animals keep warm? In this experiment, find out whether fat insulation resists cold temperatures and learn how this works in the animal kingdom.

In this science project, learn about water transport in plants and make a beautiful dyed floral arrangement with cohesion, adhesion, and xylem tubes!

This science fair project idea investigates if webbed feet help a duck (and others) swim.

Can you imagine a sky filled with bright, colorful bubbles? Make this whimsical scene come alive with bubble science!

Spiders don't go to grocery stores or fast food chains to get their food -- they set up traps and wait for their food to come to them!

Help children understand the power of germs and the importance of hand washing with this visual activity that introduces the concept of scientific inquiry.

Learn how to tell time by the sun with this cool science fair project idea that tracks how the accuracy of a sundial changes over time.

This science fair project idea teaches how the gases and pollution in the air affect the earth's atmosphere temperature.

Learn how starch and carbohydrates interact with different solvents in this fun and easy packing peanut science fair project.

Find the North Star, and measure your latitude! The purpose of this science fair project is to find latitude and learn about geographic locations.