3 year old granddaughter went crazy when she saw it. Being active, she liked to get in and out of the side vents and giggle with her sister as they got in and out. Her mother said it was easy to set up and took minutes to assemble and disassemble as the available space isn't big enough to leave it on all the time. Ventilation is great thanks to the mesh on the top - a smart idea. The waterproof base makes it perfect for backyard picnics with little friends, tea parties, and a quiet place to "read" a picture book. Her Pottery Barn sleeping bag matches her sister's sleeping bag perfectly for "hiking trips" in the living room. So great for imaginary play and way better than an indoor playhouse as it can be reduced to the size of a briefcase in minutes. So happy we found this.