– water – sugar – food coloring – pipette or science syringe  – heat source  – tall narrow glass container

Did you know you can effectively demonstrate density with just food coloring, sugar, and water! Don't believe me? This rainbow in a jar with sugar allows you to show kids how the more dense a liquid (colored for visual purposes only), the heavier it is and it will sink. 

This rainbow density jar is quick, easy, and cheap to try. Use this rainbow in a jar experiment with sugar as a rainbow activity for kids in the spring or as part of a science lesson on density for kids

No matter how you use it, this density experiment makes an impressive density tower that will impress preschool, pre-k, kindergarten, first grade, 2nd grade, and 3rd graders too.