Wow, yours are spread more than mine!
Mine are 19 and 7. But 7-9 was the most maturity with the least amount of difficulty. aaahhhh.
His brain got sucked out at 11. 13 was a nightmare. 16 was HARD. With Big J past it and Little J not there yet, I joke that I'm on parenting recess at the moment. All the fun with not much "work"...Wheeee!