I signed up at church to bring in a snack next month but I didn't know Iwas going to be the only one. Oh well too late now. Any ideas? Something easy and quick please.

you could do something like a chex mix type thing. Just put all your stuff into a big bown and then scoop it into little baggies. I bet it would not take long at all.
mini cupcakes.
make a brownie in a sheet pan then cut into small square cubes and put in baggie with powdered sugar and toss around then put in a bowl or something. i don't know, just some ideas maybe good luck

80 kids What about crackers and cheese or veggies and dip? How big of a snack are you expected to provide?

I have a recipe for a treat called "Critter Crunch" Uses small teddy grahams - It makes a whole big Bowl full - is very yummy! I used to make it for my daycare kiddies when I had one, and they loved it - doesnt cost a whole lot to make. You can PM me if youd like the recipe
HTH

What kind of event is taking place that you need to bring in snacks for 80 kids? Is other food being provided other than the snack? I hesitate to say bring something sweet if that is the only thing the kids will be eating, I would do what tdybear1978 said and bring a chex mix type snack.

Puppy Chow...using chex or crispix cereal, melted choco chips with peanut butter and butter, then powdered sugar. Very yummy easy to make and never had a complaint...

Mini-muffins? Apple slices and caramel dip? Jell-O Jigglers?

How about Rice Crispy Treats? All kids love these.

I had to do this for school once. The school said it had to be healthy so I went to the store and bought the frozen ready to use (after thawing of course) phyllo cups. I filled them with sugar free pudding and added sliced strawberry, kiwi and blueberries. The kids loved them even if it was all sugar free.

Well since Valentine's day is next month you could make a bunch of heart shaped sugar cookies with frosting/sprinkles. Kids love frosted cookies. If you are wanting to do something a little healthier maybe you could make ants on a log. Would they have time to make their own snack? Or do you have to have something already prepared? If it's possible I think the kids would love to be able to "make" their own snack. Decorate their own cookie, cupcake, ants on a log, etc... I also like the idea of puppy chow. My family loves that and it is so addictive. HTH.