I ran across this on a pinterest site and thought it might be a great summer thing for a LOT of our kiddos. It also would keep them outside playing on a hot day when Mom wanted them busy or for a party. It is a big bag of water that you make by duct taping plastic sheeting. The directions are fairly clear and it would not take all day to make. It is also quite affordable as I have seen the plastic sheeting at the price the blogger posts. I think most kids would completely LOVE this on a hot summer day.