These Halloween haunted house window silhouettes are a great idea. The ones pictured here came from a punch out kit, Spooky Halloween Silhouettes by Jeffery Rudell. However, you could easily do the same thing yourself. Tape several sheets of black paper together. Draw your design, cut out, and tape to the window. Make them as scary or fun as you like. Cats, bats, pumpkins are all good ideas. It'll really set the mood for your Halloween haunted house.