Sand castles in the sky

I had been wanting to provide T with more to do on our 3rd floor patio, as a way to make up for not having a yard. When we go to my parents house, the first thing he wants to do is go out in the yard. So he can dig in the dirt, use the hose, etc. So, today we got a sand and water table. It was a big hit. They only had red and blue sandbox sand at the store, so blue it was. T and I agreed we both would prefer sand-colored sand, but it does make for a cool photo.
He is in bed and I am about to go there myself. Nighty night.