J.W.
Hi There. I do a lot of youth work and intergenerational events, and I have had some luck using the following website. Don't let the name fool you, there are some great printable games and some very fun low budget ideas. Good luck!
www.diva-girl-parties-and-stuff.com/diva-parties.html
This one is specifically for Junior Parties, but if you just use the main part it will get you to a page that has all sorts of ideas for all kinds of parties.