A very dramatic and entertaining demonstration of a chemical change. Half ounces of Poly A and Poly B are mixed together in a cup. As the two chemicals react, a large pile of hot foam rises out of the cup and quickly hardens. The kids can see and feel, first hand, indicators of a chemical change: evolution of a gas, release of heat, and a color change.
Demo Pack includes 1 oz Poly A, 1 oz Poly B, 2 cups, 2 craft sticks
Study Group Pack includes 2 1-oz Poly A, 2 1-oz Poly B, 4 cups, 4 craft sticks
Classroom Pack includes 16 oz Poly A, 16 oz Poly B, 32 cups, 32 craft sticks
School Pack includes 64 oz Poly A, 64 oz Poly B, 128 cups, 128 craft sticks