I need your best ideas for kids 5 and up...can be crafts, art projects, hands on activities. Messy is okay, but they need to be things that I can put together once and then have for the summer, as opposed to setting up every weekend.

I usually pack a bin for my son for the summer with all kinds of things to do when we're poolside. Last year, I had some easy games, markers, paper, etc but this year I want it to be a little more self directed so he can execute on his own.