"I smell poop"

Well... here ya go....  Yesterday the dogs (and/or Jaden) were extra gassy.  All day, I kept thinking I smelled poop.  So...I would smell Jaden (and no poop)...so Jaden would follow me around the house looking for the poop.  I smelled in every room.  And this process happened at least three times yesterday morning.  Turns out, no one actually pooped.  (There is your wonderful back story)
(Here is the real story)  Jacob and I were enjoying a super evening of tv watching (the bachelor and the voice)...while Jaden played toys.  Suddenly Jaden comes over to us (with a wipe in his little hand) and says in his tiny baby voice, "I smell poop".  I just about died laughing.  So we asked "You smell poop?"
Jaden- "YeAH!  See it???"  (I think we both thought he found something)
He led Jacob over to a corner of the room...said "See it?"  and then Jaden started wiping the carpet with his wipe. 
What was the 'poop'- you ask.... it was a crayon!