Oh, sorry. Missed the point entirely. It happens way more than you'd think.
It might sound like a nightmare, but a real easy game that my youngest absolutely loves is Spoons. Yep, the old game with a standard set of cards where you try to sneak a spoon when someone gets 4 of a kind. It's super simple to learn with the only problem being holding 4 cards and cycling through new ones coming his way. We use a card rack for him, so he doesn't have to hold them in his hands, and it works.
While not a huge leap over the tediousness of Candyland, I find that it is a lot more fun to play than the Hasbro standards. Something about watching him get all excited when he's looking for that last card to make a foursome, and how excited he gets when hands start grabbing for spoons makes it more than palatable. It's also a game where only one person "loses" each time, and it's easy to make sure it's not him. I don't let him win often, but if he's lost a few in a row, I'll usually toss him a bone and make sure he's not last man out.
Probably not what you're looking for, but it's the first thing off the top of my head. I'll try to think of some other games we throw his way.