From the time my nieces and nephews are about a week old my dad starts feeding them marshmallows. It's his little treat to give to them every time they come over. They all know where the marshmallow cupboard is, and before they can even talk they stand in front of the cupboard and raise their hands for the marshmallows. We'll now that the grand kids are getting a little older/smarter this is what is happening to the marshmallow cupboard.
Here's little miss Macy sneaking marshmallows while no one is looking. I caught her, but since I'm the favorite aunt I didn't tell!