Some ideas: plinko, face painting, tatoos (you can get them in bulk from oriental trading), baseball throw (at 3 cans), potty toss (toilet paper through a toilet seat), fishing wall (good for kindergarden), dart throw, and rent a moon walk or blow up obstical course. You can put it up in the gym and the kids love it.
You might want to bring in someone that has everything already as they don't charge you for the booths, just the amount of prizes you give away. We did this and made $1,700 on ours. And we were trying to break even for the event.
Here is a link to a list of games they they have with brief descriptions.
www.funservicesil.com/funfairs/games.php3
Here is a link to the main site so you can search by your state.
www.funservices.com