The Briggs-Rauscher Reaction bounces between colors multiple times. The materials required are: goggles, gloves, beakers, a large Erlenmeyer flask, stir plate and rod (not necessary, but make the reaction easier to view changes in), distilled water, 30% hydrogen peroxide, potassium iodate, a 93% sulfuric acid solution, malonic acid, manganese (II) sulfate monohydrate, starch (the grocery store variety is fine), and thiosulfate for neutralizing the final product. I use this to introduce chemical