DIY Gumball Machine Costume by Robin for Costume Works 2014 Costume Contest. You could easily adjust this to be an adult costume by gluing pompoms onto a cheap hat. I think part of her $30 budget may of came from the Hannah Anderson cap ($$$$). From Mom Robin:
This is my daughter in her first Halloween costume! I used a gray cotton infant “pilot cap” from Hannah Anderson, 1” Pom-poms purchased from a craft store, and felt for the 25¢ graphic on her red onesie. It only cost me $30, and the only time-consuming part was gluing each Pom-Pom onto the hat.