In Parashas Shelach, Moshe instructed the spies to investigate the soil of Canaan to see if it was fat or lean. As they scouted within the borders of the land, the spies discovered unusually large and beautiful produce which grew as a result of the richness and perfect balance of nutrients Hashem put in the soil. Your students have much experience in the dirt, in the sandbox, in the schoolyard and in the garden. Create a sediment jar to teach your students about the properties of soil, and what its layers are composed of.