I regularly search for event approaches that are unusual and out of the box. I think that Youtube is certainly a great resource of this type of ideas. All you need to do is check out Youtube and do a search for "birthday party ideas" and you are going to see many hours worth of online videos with many different outstanding advices. The trouble is, who exactly has enough time to watch them all? Thus I am on a regular mission to gather some notes in order to save me and perhaps other people some time.
Here is a great video with some insane party ideas - https://www.youtube.com/watch?v=wUlJSgYGmFw
Hope you see some good ideas for your upcoming occasion on Youtube!