Thumb sucking

So it's official. Kate is a thumb-sucker. Yesterday she discovered her thumb and it hasn't left her mouth since. (Ok, so that's a bit of an exaggeration). She's loved to suck on her hands and fingers for a while now, but yesterday she found her thumb. Now everytime she's upset or tired or just wants to suck on something, she sticks that thumb in her mouth. Sigh....hopefully it won't be that hard to break her of that habit when she's older.