hun the cheeky little buggers are very efficient when it comes to hiding things in their mouth.. DD2 (also roughly 9mths) was chewing on a piece of apple almost the same size easily for 20min AFTER i thought she had finished.. i was like OMG what's in there.. get it out out out... oh thank god only apple but still it could have gotten stuck.. i was horrified i didn't know.

Take comfort in knowing it must be a trick of theirs.