In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

The goal of this fun science fair project idea is to microwave candy and investigate: do some colors of M&Ms melt faster than others?

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.

This classic children's game demonstrates how sound travels through air vs. through a solid.

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

Explore if planting seeds in a certain direction will affect how fast it germinates.

This science project uses Mohsâ Hardness Test to show kids how to compare the hardness of different types of minerals.

Kids learn how to manipulate additive and subtractive colors to send secret messages with red colored filters in this cool science fair project idea.

Do plants get crowded? Have your curious kid investigate how plants respond if they're forced to grow together in a confined space.

This science fair project teaches students about wilting and browning of salad greens.

In this experiment we will be determining whether birds prefer certain colors of seed.

Can a toy car determine the strength of a magnet? In this cool magnet science fair project, young scientists will learn how to measure the strength of a magnet.

In this science fair project, we'll use a liquid crystal thermometer to find out whether exercising makes a difference in people's temperature.

How does water pressure change with depth? Kids learn how pressure works underwater with this cool and easy demo.

This science fair project investigates whether tapping the top or the side of the can will stop a vigorously-shaken can of soda from exploding.

Do you think heat can affect a plant's growth rate?

In this sound experiment children listen for differences as they tap on a bag of air, a bag of water, and a wooden block held up to their ears.

People have favorite flavors, but what about ants? Which ant food is the most popular?

Determine if gender affects the ability to identify different smells.

Science fair project examining barometric pressure, and how it can be used to predict the weather. How does atmospheric pressures relate to weather conditions?

Will potatoes spud or sprout faster in dry, dark, or cold conditions? Find out in this science fair project idea!

Plants and light seem to be good buddies, but how far does the friendship really go?

In this science fair project, kids observe the expansion of liquids when frozen and determine if some liquids expand more than others in the freezing process.

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.

This science fair project idea investigates how the shape of an object affects drag.

Gather some friends for a bubbly soda taste test do determine calories' role in your favorite drinks.

Wiggly worms are known for staying buried in the soil, but how does that affect plants? Are earthworms and plant growth related?

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

How does salinity affect the point at which water freezes? Kids will find out by performing this cool melting ice experiment.

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