This icky-sticky creation gets kids hooked on chemistry.
30 minutes
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.