Hi Lisa, Our local dollar store (Ontario Canada) sells magnetic pins that flash different colors of light (red, blue green and yellow). It is the kind you can attach and where without putting holes in your clothing.
They work on a watch battery, and since they are magnetic you would not use the disk at the back with the magnet just the light itself. You could probably affix it with RI or edible glue.
Not to sure if it is food safe as most dollar store items here locally have had lead warnings issued (for painted wooden toys) but it may be a way to go if it is safe.
Hope this helps...Miss Lizzy
Perfect timing! the wedding I did Saturday night had little tiny lights secured to the stems of upside down wine glasses as the centerpiece. The entire light wasn't more than 1.5" long. The event planner said she got them at Hobby Lobby. They were AWESOME looking!!!
Quote by @%username% on %date%
%body%