I regularly look for party tips which are unusual and out of the box. I find that Youtube is a great resource of these tips. All you need to do is browse through Youtube and do a search for "birthday party ideas" and you are going to see hours worth of movies with countless excellent ideas. The issue is, who exactly has the amount of time to watch them all? Thus I am on a continuous mission 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
Hope you find a few great tips for your next celebration on Youtube!