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In this hands-on design challenge your child will make their very own Rube Goldberg Machine.

How does mold grow? Kids find out by testing different conditions to measure mold growth rate and learn about what factors cause mold to grow more quickly.

Learn the chemistry and physics of the brain, how our nervous system work. Demonstrate that the brain is an electrical and chemical machine.

The objective of this project is to evaluate whether a top will spin at different rates during different phases of the moon.

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

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.

This science fair project idea identifies and understands adaptations in birds.

Compare ability of selected materials to block UV-A radiation. Shine black light though glass at detecting beads underneath. Note color intensity.

Science fair project that determines the correlation between the ability of selected materials to conduct heat and a material's density.

Start your toy engines -- this is going to be a fast and friction-filled race!

Observe trends in the properties of writing materials over past 5000 years and extrapolate to future time. Prepare a table that compares writing material.

This science experiment explores why leaves change color in the fall and the role of photosynthesis in leaf coloration.

Stories change as you retell them. The objective of this science fair project is to demonstrate how information gets interpreted, distorted and changed.

How can we describe the relationship of magnetic field strength vs. distance? Kids will find out with this free science fair project idea.

Science fair project that teaches you key definitions of molecular science, and how different isotopes of an element affect the relative atomic mass.

Science fair project that examines how winter storms form and the relationship between temperature, moisture and snow.

Science fair project that evaluates how well clothing fabrics block UV radiation by examining the properties of different fabrics.

Experiment with buoyancy to learn how a submarine rises and sinks in this classic science experiment.

Can you plant the insect-attracting borage plant to increase the amount of beneficial insects in your garden? Find out in this experiment!

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

What is a wedge? Kids find out by experimenting with different wedges in this simple science fair project idea.

Understanding absorption means understanding why certain fibers and materials can absorb water! Kids will see absorption in action in this simple project.

Fudge is one of very few desserts people make at home that is actually crystalline. What happens when the fudge crystallizes at different temperatures?

Learn how to convert gravitational potential energy into mechanical energy in this fun science fair project idea.

Here's a simple science activity that will help your child better understand how wells bring us water.

Boiling water in a paper cup is possible because of convection and the thermal properties of water and paper. Learn how with this fun science fair project idea.

By dropping a magnet through a copper tube, kids observe the cool (and bizarre) braking effect produced by the eddy currents predicted by Lenz's law.

This science fair project idea determines what household items are good conductors of electricity.

This fun science fair project idea helps students learn how acid rains are formed and explore how acid rain damages the environment.