.Outside door of escape tunnel looks like a rock...great way to hide a storm shelter, or exit from the basement.
Seems like you'd be on your hands and knees But it's still fun
Slide under a trapdoor! What could be cooler?
Spiral slide idea for safe room I don't like the idea to stuck inside a tub... maybe I frefer the "fireman pole" with some device to control the falling velocity... like a little pad for feet (to standing + something to hold the pole itself.