My 15-month-old son exploded with personality right after his first birthday. Although he's always had little quirks, we're now getting to see his genuine interest in things. He loves "The Nightmare Before Christmas," he seems to be really into playing catch, and he loves to "clean." It started with him stealing the baby wipes. As soon as he could pull himself up to the coffee table, he'd snag a wipe and begin buffing.