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

Help your kindergarten scientist discover relative size, density, and buoyancy with this fun, pumpkin science project!

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

This science fair project idea investigates which objects float and sink in honey, water, and oil.

Invite your kindergartener or first grader to make giant, soft building blocks. He'll have a blast constructing, throwing, stacking, and even falling on them!

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

In this science fair project, you'll make a "ghost" appear in a test tube, and learn about what happens when hot water and cold water interact.

Your child might have noticed how bubbles quickly lose their colors and pop. Check out this creative way to make those bubbles last longer.

This science project teaches young students about germs, bacteria, and the importance of washing their hands. Students will test what is the best way to wash.