Your story reminds me of a paint experience enjoyed by your first born and his cousin. The problem was that there canvas was a younger cousin and the paint was not washable. But, the sheer joy on their toddler faces was more that sufficient to justify the number of times they were reminded of this story and had to grin and bear it.
So... I think you should add colourful bath bombs to the psychadelic marker designs -- just sayin'. Why stop now?
Your story reminds me of a paint experience enjoyed by your first born and his cousin. The problem was that there canvas was a younger cousin and the paint was not washable. But, the sheer joy on their toddler faces was more that sufficient to justify the number of times they were reminded of this story and had to grin and bear it.