Michaels

If you have a neighborhood seamstress or alteration type place you could try them. I know an owner of one and she gives me all her buttons that she doesn't like. They're not all cute, but I like them and all I have to do for them is little easy chores :D

Other than that, what about on here? There's tons of button people around. I find you get more answers if you're as specific as possible about what you think is "cute" or what exactly you're looking for. I'm looking at my buttons right now and while I don't many of them are cute...you might?

http://www.buttonqueen.com/

I use this shop a lot ~ sweet novelty buttons too.

Walmart, Meijer, JoAnn's, and Michaels all carry bags of miscellaneous buttons in different sizes. I've also found containers of them at Scrapbook stores and Big/Odd Lots. The ones at scrapbooking stores are usually overpriced though. Also check quilting stores and beading stores.

Try thrift/ consignment/ antique shops. I can almost always find a mason jar of buttons when ever I go to these three. And ususally really really cheap, much better than buying buttons idividually.

Hobby Lobby carries packages of Grandmas Buttons for $5.00, walmart has some smaller ones for about 3.00

I also find a good variety of them by buying clothes (especially kids clothes) at thrift and yard sales for sometimes as low as .25. I bought a little girl's dress that was stained but has 8 adorable flower shaped buttons on it for .50 just today :)

You may also want to look on Etsy. It can also be a great source for supplies.

I found this site. They seem to have some decent assortments where you can buy 1/4, 1/2 or 1 lbs assortments.

I bookmarked this site. I love their assortments and they have a great clearance page.