Surf's up, cat lovers! Here's an adorable summer DIY project that is purrfect for your feline friends. With eHow's step-by-step video tutorial you will be able to transform a simple, ordinary cardboard box into a vintage-style VW bus where kitties can jump and play and nap all day! Isn't is super fun? Cats love lounging around in boxes , especially cute car-shaped ones, so get a little paint, a sturdy cardboard box and make your own DIY cardboard cat house!