My son calls crafts "craps". Imphasise on the PS!
I didn't catch it until this converstaion in the store..
DS: look at all the craps on that shelf!
Me: Hon, it's not nice to call things crap.
DS: That's what they are! All those craps!
Me: Craps? Where'd you learn that word?
DS: YOU! We do Craaaaaaps all the time.
Me: (bing! the light bulb goes off!) Oh! craffffffts. Making things!!
DS: YES!! CraPPPPPPs!!!!
Me: Lol. Ok. Craps.

He says all his other F's just fine. Lol.
And his bicycle is the two-wheel-a-cycle.