How does the size of a vibrating surface affect the pitch of a drum? Learn about drum size and pitch with this easy science fair project idea.

Young scientists will investigate people's preferences for saltiness, and make some inferences about genetics and diet.

In this cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

examine how passive solar heating works, measure temperature in a parked car on a sunny day. ways to use passive solar heating as an alternative, energy

Climates with more snowfall have more coniferous forests and fewer deciduous ? Learn about how pine trees in a coniferous forest adapted to withstand snow.

This science fair project idea creates a sedimentary rock and to investigate what takes place during the rock cycle.

This science fair project idea explores if the length of the string that an object is suspended on has an effect on how fast or slow it swings.

In this activity, your child will be challenged to use simple materials to create a catapult for a small, lightweight toy.

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.

Learn all about balance and motion as your child designs a corn maze!

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

Create a DIY Electromagnet! Using a 9v battery to create an electrical field around a nail, students explore electromagnetism in this cool science project idea.

In this project children practice the scientific method while playing with puffy paint.

Which music genres have the fastest tempos? The slowest? This experiment determines if there's a relationship between beats per minute in a song and its genre.

Compare animal and plant fats and observe, and record, and draw conclusions about their similarities and differences.

In this investigation, three different juices are tested to determine which juice contains the greatest amount of vitamin C.

The project determines determine if a sports drink affects the heart rate of a student athlete during exercise.

This fun experiment provides a concrete and visually striking illustration of photosynthesis.

This science project encourages students to investigate the Mozart Effect, the idea that classical music promotes learning.

The objective of this science fair project is to analyze the effects of salinity and temperature on water.

Learn about the microclimate of your backyard by tracking rainfall, temperature, and observed weather with hand drawn charts and graphs.

Do you think you could walk around upside down -- with your feet in the air and your head on the ground?

This simple heat transfer experiment is a great introduction to the concepts of heat transfer and conduction.

Get down to the rubber with this science project that tests the effectiveness of different types of erasers.

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.

Want to see a great example of Newton's first law? Kids will learn about basic physics with this fun, ballistic experiment.

With this science fair idea, little scientists will gain valuable insights into the physics behind throwing a baseball.

Why doesn't the ocean freeze? Students answer this question by simulating the chemical composition and temperature of arctic waters in their own home.

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.