One of the easiest fundraisers around for this kind of event is a "dine and donate". find a local restaurant who is willing to donate 20% of the proceeds for everyone who brings in a flyer. All you have to do is find the restaurant and distribute the flyers as widely as possible. The restaurant tracks the flyers that come in and writes a check for 20% of the bills' total.
Ask classmates to do a lemonade/baked goods stand at her school (have to get permission and follow the school rules, of course). Car wash at school is also a good idea. If the school will allow, you could also have a "no bake sale" where people send money in the amount they would have spent on baking something or buying something.
Silent auctions can be profitable, but are a lot of work. They can be done in conjunction with a spaghetti dinner.
Hugely popular events around here are crab feeds. Not quite in season yet, though.
If the child is into any particular sport, you could have a jog-a-thon, or something based on the sport, or alternatively, a read-a-thon. You could do a board game night, like a Scrabble tournament, or Monopoly...
Best site that I know of for do it yourself ideas: http://www.fundraising-ideas.org/DIY/index.html. They have some fabulous and fun ideas.