All you need is a water bottle that you can cut the end off of, an old rag or wash cloth you can cut, a rubber band, and some dish soap with water. It was fast, easy for him to do without my help. Plus, it was a good way to get him outside after watching waaaaaaay too much Spiderman on netflix.
Clearly he needed to get out... :o)
And Hansi and I had fun watching