I heard you guys like a paper airplane which can actually fly - 9GAG
wood pallet sandbox, with bench seats that unfold to cover the sandbox...very cleaver.
Hape - Garaje de juguete (HAP-E3002) [Importado de Inglaterra]: Amazon.es: Juguetes y juegos BUSCAR EN TIENDA
Hotwheels Parking garage, homemade with recycled materials such as cardboard, plastic rolls, recycled sheets etc. Breif detail in the comment box.
wooden parking garage - Google Search
Wooden Toy Car Garage
DIY Toy Garage
DIY cardboard garage toy for kids to make with box and cardboard tube, paper rolls
PVC playhouse, a simple and inexpensive design your kids can use indoors or take outside for some imaginative fun.