How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

This science fair project idea identifies trees using a dichotomous key.

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

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

This science fair project idea explores how much force is needed to move a lever at different distances from the fulcrum.

This science fair project idea demonstrates how air resistance contributes to denser objects falling faster than less dense objects.

This is a quick, easy science fair project that conveys the idea of density to preschool and early elementary children.

In this project students experiment with making music using only glasses of water.

This science fair project idea explores whether a plastic slinky works as well as a metal slinky when walking it down the stairs.

Check out this cool science project idea to learn about rocks and explore the cycles of formation, breakdown, and reformation of rocks in the Earth's crust.

Children will learn all about cause and effect as they experiment with potion-making in this Halloween themed activity.

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

Science fair project that determines whether landscaping fabric impacts the ability of plants to receive water.

This science fair project idea teaches that time always passes at the same rate and nothing we do in our daily life âreallyâ affects how fast it moves.

Design a survival kit. Brainstorm various survival scenarios. Address basic human requirements and natural resources. Describe each tool as well uses.

Science fair project that uses muriatic acid to develop fingerprints that would otherwise be invisible.

This tricky building block challenge asks your learner to think creatively. They will work on their divergent thinking skills as they try to fill up an index card perfectly with building bricks.

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

It's rhyme time! With this science fair project idea, your child will find out which words can be considered easy rhyming words, and why.

Examine the effect of pressure on carbonation in soda.

Help kids tap into their inner inventor by teaching them how to make peanut butter through trial, error, and lots of taste testing!

This project is a vivid, concrete introduction to the basic but important idea that plants need sunlight and water to grow.

This science fair project idea explores how enzyme inhibitors, active sites, non-competitive enzyme inhibitors, and substrates work.

What are the benefits of good posture? Kids will learn about the cognitive effects of good posture through conducting and observing a controlled experiment.

This science fair project idea explores whether color affects a person's emotional state.

This activity challenges students to use computational thinking as they create a sequence of commands that will make a robot navigate around several obstacles.

What do worms eat? Kids find out what kinds of rotting leaves and vegetables worms prefer in this cool compost science fair project.

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

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.

Does your middle school teenager have good reflexes? Gauge his reaction time in this science and math activity that requires only a yardstick and a friend.