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

Here's a fun activity to help build thinking skills in young first grade scientists, and to encourage them to have a blast exploring the mass and volume.

In this science fair project, young children discover what happens when two fluids that have different densities get together.

Here's a classic celery science experiment that uses celery and food coloring to demonstrate how plants absorb water.

Every time a sound is produced it emits a sound wave. This experiment demonstrates how sound travels, using nothing more than a spoon and a string!

Your child will do a fun science experiment using soap and pepper flakes to help understand the concepts of water molecules and the surface tension of water.

Stir up some enthusiasm for experimentation with this candy-cracking science experiment!

Take to the air with science by experimenting with helicopter seeds right in your own backyard!

Put a twist on traditional oil painting with this fun science activity that you and your first grader can do together.

Turn the common pastime of constructing paper airplanes into a lesson on the physics of aerodynamics and flight with this fun science activity.

Your kid will be captivated as she watches liquids change color before her very eyes during this fun science project that introduces some chemistry basics.

This science fair project idea experiments with spinning color wheels and optical illusions.