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

This science fair project teaches kids experimental design and how to test if subjects can really sense if they are being watched.

Science fair project in which you will attempt to throw a ball the greatest horizontal distance possible by using different angles.

Discover how to make fake snot with this cool science fair project idea to learn about polymers, enzymes, and more.

Here's a science and nature activity to help your kindergartener get outdoors and learn about the structure of leaves.

This science project teaches students about organic farming and the benefits and disadvantages of commercial plant food.

What is mulch? Kids will provide soil with a wet blanket of mulch and see if that helps keep drought-stricken soil damp.

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

How do organic materials become soil? This science experiment measures what materials biodegrade.

What's the best way to make DIY compost? Kids will learn about aerobic and anaerobic decomposition while learning to appreciate the value of composting.

Are your taste buds up for the challenge? Put tongues to the test with this science fair project that examines who enjoys sour flavors more, adults or kids?

Science fair project that examines condensation and the conditions needed in order for dew to form.

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.

This science fair project idea determines if the color of light affects the growth of plants.

Is cleaning with lemon effective? Get ready to give this science project some elbow grease and find out if acidic lemons can be used as a cleaning agent.

Science fair project idea examines validity of mood ring predictions. Analyze accuracy of results, consider the impact of temperature

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

Help your child create a garden journal sketchbook as she observes and records the natural world through the changing seasons.

This clay "painting" activity encourages and supports creative development and critical thinking skills.

Help your kindergarten scientist predict and observe as she explores the science of smell...and have a great time doing it, too.

Use sticks and stones to create create an outdoor version of tic-tac-toe!

Make a backbone model to explore human anatomy and life science.

Science fair project that compares the biodiversity of fungi in different ecosystems by identifying species of fungi.

Help your kids fall in love with nature by making a simple clay bird bath. Set it up in your yard and watch the animals venture in for a sip of water.

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

Ant behavior is closely related to light intensity. This free science fair project idea examines how fast ants dig when they are exposed to to light and dark.

Kids will learn about the interaction of lactose and lactase in milk and discover why we describe enzymes as catalysts in this fun science fair project.

Find out whether soil amendments can improve soil conditions and help you grow a bigger beanstalk in this ecology experiment!

Can you increase the light and plant growth in your garden using mirrors? In this experiment, measure light reflection and find out!