Henri was quite the little theif too for a while, he has grown out of it though.
He liked to steal paper, flip flops, pens, underwear, socks, my phone, old stuffed animals, anything. I still to this day don't know how he got that stuff, I am very careful with him and always check to make sure there is nothing he can get that he isn't supposed to have. These little babies are sneaky things!
