We used modge podge and glued 2 wiggly eyes to our iPhone plug, it makes for a super cute, and super silly prank.
I know that this shouldn't need to be said... but here it goes. ALWAYS use common sense when you are working with children. Of course, do not do this project for a child that is young enough to misuse a plug-in with their curiosity. This may be fun for an older school age child, co-worker, friend or family... just to make them smile.