I have been finding a lot of DIY tutorials for flowers lately. But here's a new one for tiny little flowers, ideal for a boutonnière. An entire bouquet of these roses would actually only cost $2!! Best DIY ever. hahaha. They're actually made of crepe paper streamers bought at the dollar store. No glue, staples, or adhesive of any kind necessary. So easy, so cheap, it's nearly impossible. The tutorial video is halfway down the page. I love the kids' comments during. :-)
good luck :)