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

What causes dilated pupils? Young scientists will find out by applying what they already know about changes in pupil size and making models of the pupil.

This science fair project idea builds models of various types of bridges and then determines which bridge design is the strongest.

Study science with your first grader in this arts and crafts activity that models the reason why fall leaves change color with some paint and crayons.

Check out this cool science fair project idea that models the behavior of the cold desert plants: xerophytes and halophytes.

This science fair project idea highlights decomposition rates by comparing how long it takes an item to decompose in a compost pile vs. a landfill.

Beetles come in many shapes and colors. Here's how your second grade child can create his own beetles to paint and play with!

In this science fair project, apply the principles of leverage and force by building six simple machines designed to set weights in motion.

This science fair project idea recreates the movement of planetary bodies in order to learn why they sometimes appear to move backwards.

This science project has students collect wood samples and invent new uses for different types of wood based on its properties.

This science fair project demonstrates the principles of reflection through simple experiments involving mirrors and light.

Science fair project which measures the shadow cast by a meter stick at various times in order to predict the circumference of the earth.

What causes sound? Here's a simple science experiment that adds a visual element to the science of sound to help kids better understand this tricky concept.

The objective of this science fair project is to experiment with balancing everyday objects and observing the the effects of gravity on materials.

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

What is the hydrologic cycle and how does it work? Check out this fun and easy science project where you will model and learn about Earth's water cycle!

Have your child build his own mini waterfall, and help him develop his planning, problem solving, and architectural skills.

Learn about the role of Earth's rotation on the Coriolis Effect and hurricanes in this science project. Model the Coriolis Effect on a hurricane's direction.

Learn how to make a food pyramid with animals in a a coniferous forest ecosystem around your home.

Learn about the layers of the Earth and make a model! Create a earth layer book, cake, or clay diagram.