Go on pinterest they have the cutest ideas!!
Well you can pick out a theme get party favors for the guest. Cake lol. and games there are so many types of games but just chose your favorites you can Google some cuz i can't think of any right now lol. have food. you can go to a store and do that gift thing forgot what its called sorry /: but yeah that's what you can do i guess lol im just starting to plan mines too i hope this helps :) you can also ask some of your friends with kids what they did :) good luck