I regularly look for event approaches which are unusual and out of the box. I find that Youtube is without a doubt a great resource for these sorts of tips. All you will have to do is browse through Youtube and do a search for "birthday party suggestions" and you can see many hours worth of video clips with numerous fabulous tips. The trouble is, who exactly has time to watch them all? So I am on a regular mission to put together some notes in order to save me and hopefully other people some time.
Here is an awesome video with some insane party ideas - https://www.youtube.com/watch?v=wUlJSgYGmFw
Hope you see several great tips for your next occasion on Youtube!