My kids love my bath bombs. It's soap and shampoo and actually getting clean that they have an issue with
I tried coloring them, but I actually prefer them uncolored. I add milk powders and finely ground oatmeal, epsom salts (sometimes colored, sometimes not), and mango butter in mine so the natural color is really very pretty. Sometimes I hide little toys inside like in Robert's photo but I put the little toy in the middle so the kids can't see it and don't know what they're gonna get until it finishes fizzing. I pull these out when I can't get them to get in the tub.