Don't let the idea of a bathtub full of "goo" deter you. Children will be positively giddy while splashing about in the environmentally friendly blue Gelli. It might take you a while to get them out! Create the gel-like goo by sprinkling a packet of non-toxic, non-irritating Gelli powder over the surface of the water and watch the color and texture change! When you're done playing just sprinkle the non-toxic dissolver over the surface and rinse it all down the drain. Even the slightly porous older tub that participated in our experiments came out stain free with only the happy memories of children at play remaining. Each package is good for one bath.