Being the owner of large breasts that require wearing a bra inevitability leads to the use of the "boob pocket" from time to time.
As my daughter has gotten older and more aware, she has noticed me putting in/pulling out various items from this mysterious abyss. It has now become her mission in life to store all her most prized possessions eg dummy, toy phone, treats down my top, then once it has disappeared into my cleavage exclaim "Gone!!".
Very proud of her brilliant new ability to preform this feat of magic, she claps.