In this science and engineering activity, children will explore types of tunnels and their purposes and then design and build a tunnel of their own.

What are the effects of fertilizer on plant growth? What's the best fertilizer type (solid, liquid or powder)? Kids find out in this science fair project idea.

Show your fifth grader how to create a vivid and colorful, Picasso-inspired, 3-D mask.

Science fair project that compares the freezing temperature of salt water and freshwater in order to learn about supercooling and condensation nuclei.

What are buttress roots? In this fun science project, make a model of a rainforest tree and learn how they help trees survive in the tropical rainforest!

Set off an a science adventure as you prepare a row of bee homes for your new visitors.

Here's a homemade bulletin board project to help your fourth grader's school year start off right.

In this simple circular motion experiment, you'll observe tangential velocity and learn about how acceleration and centripetal force affect an object.

In this cool physics experiment, use double plane mirrors at various angles to learn about light reflection. Then, see if you can solve a puzzling problem!

Do you think heat can affect a plant's growth rate?

In this design challenge, your child will create a parachute for a small toy using typical household items.

Create safe lightning for kids! They'll learn how to make lightning at home with this fun science fair project idea illustrating static charges and grounding.

In this activity, learners will discover how to make a basic water filtration system using common materials found around the house or outside.

Kids learn about examples of mechanical weathering and conduct an experiment with seeds and plaster in this cool geology science fair project idea.

Kids learn how to manipulate additive and subtractive colors to send secret messages with red colored filters in this cool science fair project idea.

Enter the buzz worthy world of bee watching and find out what time bees like to wake up!

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.

What is topography? Kids find out by learning to make and read a topographic map in this awesome science fair project idea.

In this fun project, use a memory game to test various age groups and determine whether aging directly affects short-term memory loss.

This science fair project focuses on the use of a conductivity device that will determine if a substance dissolved in water can or cannot conduct electricity.

What causes the seasons to change? Kids find out by modeling the earth's tilt using a globe, flashlight and graph paper in this cool science fair project idea.