But, Dad...

I love teaching my sons things to stretch their brains. When Ben was younger, I taught him to fingerspell (a la "sign language"). He learned it pretty quickly and (while it was novel) enjoyed it.

I recently introduced Ben'Ollie to fingerspelling. One thing you must know, however, is that Ollie has a fascination with words that you'd probably expect a 5-10 year old to have a fascination with... (e.g., diaper, potty, toilet, etc.). The photo here shows Ollie gleefully completing his first finger-spelled word: B-U-T-T. He knows he's not allowed to say it aloud, but he had a big giggly grin on his face after fingerspelling it.