What are some cool things to do while lucid dreaming?

I'm trying to lucid dream for awhile but no luck yet. When I do what cool things can I do? I was thinking maybe going on a lucid vacation *ahem* Disney World *cough* haha. Or just do crazy stuff! If you have, what does it feel like? When I dream, how should I know when I'm dreaming? I wanna do lucid soo bad! If you don't know what it is, look it up.