Poly-Mart Emergency Water Storage Tank | 250 Gallons | Tanks For Less
water and bleach make a light bulb. Could use this idea to light up a big box that the children decorate and "hide" inside. They get their own light bulb!
distilling rose water - another visual But you could also use this method to distill water, put dirty water in pan, clean glass collector inside pan, turn lid upside down, conical lid will drip the steam into your glass