This cool physics demo illustrates the simple harmonic motion of a pendulum while teaching kids the important concepts of potential and kinetic energy.

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.

Dig into the physics of pool to explore some cool applied math and learn about what happens in an elastic collision of equal masses.

What are the effects of colored light on plant growth? Explore plant behavior in this cool botany science fair project and learn about phototropism!

This science experiment tests why guacamole goes brown and if leaving the pit in will stop guacamole from turning brown.

Young physicists will wrestle with a discrepant event: the Hammer Ruler Trick. They'll make some inferences about torque, balance, and center of gravity.

What is persistence of vision? With this hands-on science fair project idea, students will demonstrate this cool and dramatic phenomenon in their own classroom.

Kids build a rainforest food web to explore trophic levels in this cool science fair project for 4th grade.

Make stunning pendulum waves and learn the math behind the patterns generated with this cool and easy science project.

4th graders construct an ocean food web to learn about consumers and trophic levels, food webs, and food chains in this cool ecology science fair project.

Learn about the Atwood Machine and Newton's 2nd Law with a pulley and masses of different weights in this physics science project.

The objective of this science project is to determine whether the brain first processes colors, shapes, or words when given conflicting messages.

What is elasticity? Students will investigate how this concept applies to bouncing ball physics by testing the bounces of balls made out of different materials.

This cool middle school science fair project idea helps students explore the role phototropism plays in the growth of green plants.

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 teaches students about wilting and browning of salad greens.

The apparent movement of the sun has been used to keep time since the bronze age. In this science fair project, kids plot solar time against mean solar time.

Get a cool science project idea on a photovoltaic cell and explore the various factors that affect the energy output of the photovoltaic cell.

How does bleach kill bacteria? Kids find out in this impressive bacteria science fair project by testing different concentrations on a safe strain of E. coli.

Wild-type and GAPDH mutant Caenorhabditis elegans were used as an example of how glucose or sugar affects the lifespan of humans.

This science fair experiment examines the relationship between gender, age, and smiling.

The objective of this science fair project it to determine whether adding ethanol alcohol to gasoline slows the run time of a motor.

The goal of this science fair project is to evaluate the effect of heat on sound wave frequency.

This project examines the affect of temperature on viscosity and surface tension of different liquids.

The goal of this science fair project was to examine how different angles of decline affect the tipping point of a vehicle.