Show your child that the simplest ingredients (salt and water) can be used to illustrate the concept of density!

This science fair project idea explores how the shape of a boat affects its density and how much weight it can float.

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

Science fair project that examines the different types of precipitation, evaluates the density of snow and calculates the ratio of snow-to-liquid.

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

Do different types of oil mix or stack? Find out in this science fair project idea!

In this science fair project, kids start a chemical reaction that will make a balloon inflate itself!

In this science fair project, learn how a mineral streak is made and how it can help identify an unknown mineral.

This science fair project idea examines the reason boats are shaped and engineered.

A homemade lava lamp gives any room a retro flair. Find out how to make a homemade lava lamp, and learn some science too, with this educational activity.

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.

In this experiment, students find out what happens when a less-dense fluid interacts with a denser one, replicating the effect of cooler solid rock on magma.

Learn about lateral earthquake motion and its effect on high rise buildings in this simple 4th grade earth science experiment.

This science fair project idea explores the different properties of matter.

In this experiment, young ecologists will learn about a type of edge effect: how trees and plants at the edge of a forest can act as a weed filter.