Star wars miniatures game with Nathan(9) and Thomas(5)
Essentially, I boiled the rules down a bit to:
Move (normal rules apply) then shoot (normal rules apply)
(We skipped harder features like picking an action/barrel rolls/etc, though once I've got them firm on the basics they should be alright on the more advanced rules).
I gave them the best tie fighters (there's two tie fighters in the base set) and me the worst x-wing pilot.
Takes long to setup (getting everything out of the box, assembling the fighters, figuring out where the hell the movement rulers are underneath all the other bits) and plays very quickly (20 minutes is the longest we've played for-though it should play quicker, I drew two critical hits destroying my entire ship in two shots).
They really enjoy it, I keep bending the rules though, letting tom roll an extra defence, flying my ship (stupidly) in their line of fire.
Even at that, it's still fun to play (I just pretend I'm Porkins)
Looking forward to playing it properly with an adult though, and then I can accept ignominious defeat purely because I'm rubbish at games and not because I'm not letting the kids win...