The Last Guardian
It's a pretty game, and the story does a good job of showing the bond forming between you (as the kid) and the giant feathered cat with a chihuahua head. You can definitely see the influence of Ico on the gameplay, but instead of two equal human type people cooperating to traverse obstacles, there's a lot of freshness to having cooperation between big and small. Trico (the giant featered cat with a chihuahua head) can be an annoyance -- it moves slowly and even when you're trying to tell it where to go, the little hamster in a wheel brain (or rather the AI) is not very reliable. Not a hardcore game, but an enjoyable experience with some challenging puzzles.