Oh, the joys of a really big box!
First, C&D transformed this vacuum cleaner box into an "X-box" (complete with a "Choking Hazard! 3 and up" warning that C drew on one of the flaps).
Then it became D's dentist office...
...before its final incarnation: ROBOT BOX.
Sadly, because it took up approximately 1% of our square footage, it was recently sent to the recycling. Farewell, dear box! We shall always remember you.