My fourth grade students are currently studying water. They are learning about how little fresh water we have on our planet and how crucial water is to our survival. One of the early experiments has them predicting what happens when a drop of rain falls. This prepares them for the water cycle which comes further in the unit. My students enjoy dropping water on bricks, wood, sand, and other surfaces and making observations. They are always surprised when the water piles on the wood, or soaks through a brick. Hands-on-Science is the best!!