I enjoy games that you can go back through the levels to collect more. Jynxing the dragon statues, the gargoyles, the dark senser thingys. Hidden cards, buying cards but to get them all you have to play as the different characters so you can get beans to buy them. I just enjoy collecting everything, plus it has a slight puzzle element to it. Sure it's no DaVinci but I'm a little kid inside plus I love Harry Potter.
BTW: Actually went and saw Chicken Little in the theaters the other day. I was the oldest guy there that was by himself, the others were dads and such with their kids. I loved it.