That is the coolest box!!! I’ve never thought of making doors and windows in the boxes I give Burt. I used to make cubby houses for my kids out of huge boxes though and they loved them. Burt tends to kill them in minutes so I would probably spend more time playing with the box to make it cool than he would take destroying it. I’m gonna do it though the next time I give him a box, he loves going in them to hide for a second then explodes out if them with a big “RAH” and a cute eye pin. He does sooo love boxes even if he tends to get angry at them when he can’t land on the edge of them without them tipping.