Snowboarding on a tramp is actually really fun, I was using my friends and you can actually do some sweet stuff on it, was able to rodeo and spin up to 9, if you can get an old snowboard or use a friends, I suggest you try it
Pool noodles are simple, inexpensive and work great. Just tape the pool noodle to the outside of an old pair of shoes and you will be solid. If you want something more rigid, use small pvc pipe to support the pool noodle.
This is what i do and works great.