Glue them together at right angles to make lightweight ninja throwing stars...
Hand them out to people who have good idea's while saying you wanted to give them props for their great thinking!
Get a small battery powered cooling fan, attach the props to it backwards for an awesome cooling fan or stick in the back of a lego car for a great propulsion option.
Break half of one side completely, glue to your head, dribble ketchup down from it, photograph yourself and tell people you just had a terrible drone accident and need to go to the ER.