I am not an app person (except for Doodlejump; goodness, I love it). So when my son started getting into them, I was both perplexed ("how does that...work?") and nervous (what if he spends too much money? what if he fills up my entire phone? what if I look away for a second, and all of a sudden he's being shown NRA ads during commercial breaks?). But it turns out that the apps my son gravitates towards are amazing - so amazing that we literally spend hours (!) every single weekend (and, ok, some mornings, before my daughter wakes up) laying in bed playing them.
Consider this a PSA. Your kids will love these, and so will you.
Super Brain. This app asks you to solve riddles that require abstract thinking and somehow are equally suited to an eight-year-old and...me. I can actually feel myself growing smarter with this thing (and the fact that my son is way better than me at it is both depressing and wonderful).