LOL

GARDEN EXPRESS !!!!!! Seriously the grandmas LOVE bulbs, and it is no cost to the Kindergarten, you just order in your catalouges and distribute them... The cut of for the summer bulbs orders has just ended. With the summer ones you get 30% of all sales. With their main one "Spring Collection, available from Feb, you get 50% of all sales. Our kindy easily gets over $200 profit each time we do it.
Oi!!! it's not JUST grandma's that love Garden Express fundraiser!!! they have minimal mark up on everyday prices, and the school/kinda gets heaps of profit from it!

cookie dough - not sure how well it would work for a kinder, but all the schools and stuff here do it at least once a year (they stagger it over a few months, so we have a constant supply!)

SPC fruit bulk packs - again, not sure how they work profit margin wise, but the local school/kindy are running it at the moment for about the third year - we're from a small town, so maybe 80 kids combined from the two, and they still do alright

at work, we choose a charity to support every year, and do fundraising efforts all year towards them - we've done the photo sittings, trivia nights (can be harder to organise, but also very profitable), pie drive, raffles (mothers day, easter, fathers day, valentines day, winter, summer, spring - always a raffle on the go!), chocolates on team leader desks all year round. we've also had a fete and party plan day...

party plan days work ok - not too difficult, but can take a bit of advertising - get lots of different party plan people to come in, $10 to have a table (or whatever amount), people pay a couple of bucks to get in, sell supper or whatever...

if you have someone associated with kindy that sells something, and you just want to do a big party - instead of getting free products (though with kids toys it could work) you get a percentage of all sales from the party... i've done this several times with different products...

those last couple are probably more time-intensive to organise, so might not be what you're after, but i figured seeing i was waffling, i'd just keep going