We bought our DS8 a "craig" brand tablet from Rite Aid for $88 as his big Christmas gift. It runs Android, takes an SD micro card and so far my DH says it works quite well (he's been playing with it for three days now).
IPad was defnitely out of our budget for DS8

But this seems like a good plan for him, at least for now. If he does well with it, we'll probably buy him a 'better' one next year.
I'm going to be getting a Nook Tablet for Christmas for myself. We did consider the Kindle Fire, but the big drawback to that (in the eyes of my techie DH) was that the Kindle Fire doesn't take a memory card, so you can't put you own stuff on it that doesn't come from the
Amazon store (DH had the same issue with the Ipad).