This is a quick and easy variation on the covered button hair elastic I showed you a few months ago. All you need for each one is a covered button, a bobby pin with a circular pad, and some E-6000 glue. I used size 24 buttons, which are 5/8" in diameter, and both the bobby pins and the glue are available in most craft stores.
Refer to the covered button hair elastic tutorial for photos and directions on how to cover a button. Before you assemble the pieces, be sure to remove the loop from the button back with a pair of pliers, and discard it where children and pets can't find it. Then simply attach the pad to the back of your covered button with a dab of E-6000 glue. Let the glue dry completely before using your new bobby pin.