"I Don't Buy A Playhouse. Just Cut Windows And A Door In A Large Potato Bin From Costco"
"Thick, triple-corrugated cardboard might as well be plywood, given how strong it is. I installed one of those battery-operated PIR motion-activated lights inside, so she has interior lighting when she crawls inside. It's her favorite place to hang out, and it costs a whopping $0. Bonus: It's white and colorable for her own decorative flair."