Hayden’s recently become fascinated with his head. Sometimes he seems to think the best way to explore something is to head butt it. He has done this to doorknobs, the TV and the windows lately. Luckily, he’s not doing it too hard.
He’s also a little confused by hats. He’ll hit a hat on his head a few times. He likes to play with the brim of his ball cap as well: 
This makes me think of an old Ernie classic. I tried to sing it to my mom on Sunday, but this is clearly the better option: