I routinely hunt for event approaches which are unconventional and out of the box. I find that Youtube is a terrific resource for these tips. All you will have to do is browse Youtube and do a search for "birthday party tips" and you can find hours and hours worth of movies with a large number of exceptional advices. The problem is, who exactly has the amount of time to watch them all? So I am on a regular quest to gather some details to save me and also perhaps others some time.
Here is an awesome video with some insane party ideas - https://www.youtube.com/watch?v=wUlJSgYGmFw
I hope you see a few good ideas for your next gathering on Youtube!