Introduce your child to chemistry by helping him create a suspension.
When salt or sugar mixes with water, it dissolves in the water to form solutions. Substances that do not dissolve in water form a mixture called a suspension. Follow the instructions below to create a suspension and investigate its properties:
Cornstarch and water, like quicksand or ketchup, is a type of mixture called a suspension—it never really mixes together. Rolling the mixture in your hands, it compresses together and feels dry. Once you stop rolling, the cornstarch starts pulling away, leaving ooze in your hands.