My DS who is 21 months is a bit obsessed with shoes. He only crawls, (walks very rarely) and HAS to have his trusty black thong on his hand. 1 will do, 2 is much better.
It's the first thing he asks for when he wakes and he will carry it around all day long. If we get in the car and he doesn't have his thigh, he says 'shoe shoe' and cries if I don't get it.
It's been like this for at least 6 week now....
Right now he's sitting in his pram, thong on hand.
He does play with other toys etc but he just cannot let go of his shoe.