Liam's growing up

A few days ago Liam at age 5 1/2 discovered that he had 2 loose teeth. His response to this discovery was "well, I guess I'm done sucking my thumb". And he totally is done. When I asked him about it this morning he said "yep! In growing up. I'm not sucking my thumb anymore and I'm not scared to go upstairs by myself anymore. Yep!" He's just so proud of himself.