The puzzle thief

Sam loves to chew on the knobs of puzzle pieces so he is not allowed to play with them.   This morning he picked up a puzzle piece and then looked at me.  Of course I shook my head no and said "Sam, we don't chew on puzzle pieces".  Instead of putting the piece down he grabbed on and took off crawling away from me.  He crawled 5-6 feet and then sat up and started to put it in his mouth again.  We went through the same "don't eat it" process and he pulled it down and took off again going another 3-4 feet away from me, except this time he didn't sit up; he stayed on his tummy and went to put it in his mouth.  I called to him and he looked at me over his shoulder and sighed.  He just can't get away with anything.  :-)