As cool as a magically slippery stone slide sounded, it wouldn't be authentic, and authenticity was the name of the game, after all. Pete squinted at the empty spot where they'd decided the slide should rest; it was crying out for a slide, really. And now that he knew there should be a slide there, the whole room seemed sad without it.
"Well," he said, resonably, trying to wrap his mind around the intricacies of modern muggle innovation, "they didn't always have plastic, did they? Maybe...metal?"
Muggles had always had metal, of this Pete was sure.