well, i wonder what the theme is to the party...i had a similar question earlier this month, and (with my daughter's olivia the pig theme this year), came up with inexpensive watercolor paint sets...because she loves to paint masterpieces and such LOL. i'm gonna put a tag that i'll make on the computer and print out and attach around it with ribbon. another example, my nephew last year, had a star wars themed party. they made "light sabers"...just buy a bunch of pool noodles, cut them into thirds (or halves, depending on the length you want), and use silver duct tape and black tape to make them look like sabers. you can just do one unique favor like that...
it's kind of hard sometimes to think of something like that, isn't it? lol, it took me forever to come up with something!...soooo, after all that, can i ask again - what is the theme?
oh duh lol!~didn't read to the end LOL...sorry...
you can use a favor that reflects the theme, even tho you are at a bounce house. that's what another child's family i know did. they went to an indoor bounce house place and used scooby doo for the theme. they used a coloring book. maybe you could go to the dollar store and find a trucks coloring book and cheap (non toxic) crayons? or party city always has good stuff too ;)...hmm, lemme think, and i'll be back!
okay i found this link: http://www.orientaltrading.com/ui/browse/processRequest.d... and they offer things like a flame printed bandana and a personalized tin with a monster truck on it...they are a bit pricey in my opinion but they are cute. hm, maybe make a placemat they can color when they come in and then take home? hope i helped, sorry if i didn't lol!