Yarn balloon spheres: Cut strands of yarn, blow up balloon. Mix equal parts craft glue & water. Dip yarn in glue, wrap around balloon. Hang balloon with clothesline & clothespin. Once dry pop balloon and remove. Modge-podge could work too.
We use lanyards for three different hall passes (library, office, locker/restroom) so I could make something like this actually work for my high school classroom! (Elem teachers get all the cute stuff)