Flying and Puffin, thank you and I am always grateful for your input.
He's the kind of kid who does fifty activities a day. He plays with legos, blocks, books, does workbooks, paints, draws, puzzles, it goes on and on at lightspeed. Yesterday I spend 40 minutes rolling newspaper into dowels so he could build an international space station. Everything is so intense that I do need a break and while his brother takes a nap, I have him do an independent activity so I can get something done. I am basically a teacher all day from 6 a.m. until he hits the hay. He wakes up doing math or reading or writing or whatever the day's topic is.
I use apps to give him some independent time and he needs something more challenging than the lego building games. It's pure suvival for me. I am not using apps to replace anything real, just for entertainment.