(1) Pillow Blanket Mountain
Procedure: Procure six large cushions from sofa on back porch, plus two to three throw pillows, plus three bed pillows from upstairs, along with several blankets and/or sheets. Create a large, fluffy mound in the middle of the living room floor. Alternate jumping/diving/sliding off the couch onto the Pillow Blanket Mountain, lolling around on top of it reading books, and running across the length of the dining room to leap or belly flop onto the pile of pillows.
(2) Repurposing the play mat
I don't think this is exactly what the makers of our alphabet play mat had in mind when they decided to make the letters removable....
(3) Taking over the toy bins
We have not had much luck so far convincing Leif and Bjorn that our various toy storage boxes are actually for toys, not for boys.