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

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.

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.

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.

Science fair project that develops latent fingerprints on a non-porous objects by converting superglue from a solid state to a gaseous state.

Test whether plants can grow without sunlight and water.

Construct and experiment with a periscope using reflected light rays to gather an image.

Find out whether putting something on top of a plant will inhibit its growth.

Science fair project idea which teaches you how to make butter by separating cream into butter and buttermilk.

Science fair project in which you will learn more about the natural world by preserving and identifying different animal tracks.

In this project, sunlight is blocked from a leaf in order to see the affect that sunlight has on leaves.

This science fair project demonstrates the magic of arches by challenging students to stack telephone books on top of eggs without breaking them.

This science fair project teaches students the differences between fruits and vegetables.