Yay for ABC Foam Letters!

We have hard floors and Harrison sometimes falls backwards and bangs his head. I'm tired of his poor little head hitting the floor, so I put down Hunter's 'ABC' foam letters in the corner of the living room so Harrison can have a "safe, soft" fall. Of course Hunter wants to take apart the letters, in his words "I put the puzzle together". It's hard to tell him no, but they are there for safety reasons, not for play.