The Guessing Game

First off, here's a picture of one of the cupcakes I'd bought for Dr. Miyagi and John and his wife. I hope they enjoyed! I know DH and I thoroughly enjoyed the ones I brought home for us.
Now on to the guessing game...I had dinner with my friend K this a couple Thursdays ago. She gave me this tin to entertain me during the two week wait. It's NOT popcorn and when I shake it, it sounds like a puzzle.

So...any guesses???