Hmm, that's a unique request! Floating spaghetti is a bit tricky, but I'm sure we can make it work. We'll need some spaghetti noodles, a bit of cooking oil, and some string. First, we'll cook the spaghetti noodles according to the package instructions. Then, we'll coat the noodles with a thin layer of cooking oil to prevent them from sticking together. Finally, we'll attach the noodles to the string using small pieces of tape. With a bit of trial and error, we should be able to create a floating spaghetti elf on the shelf!