I found this an thought it looked interesting, maybe someone would like to make it.
Let me know how they turn out if you make them.
Here is a link that might be useful: Bath snowballs
Those are neat! You have to be careful with the food coloring. I made some foot soak for my hubby and I used a tiny amount of food coloring and it turned his feet a slight shade of blue. The idea is very neat though! TFS!