Materials Used: Hydrogen peroxide, bubble bath (the cheaper the better), potassium iodide solution, food colouring, a 1 litre volumetric flask, goggles and gloves Procedure: Fill the volumetric flask about 1/3 full with hydrogen peroxide. Add food colouring. Layer about 50-100 ml of bubble bath on top of the hydrogen peroxide. Quickly pour 50-100 ml of the potassium iodide solution into the volumetric flask. Stand back! BACK