Answer:
You could use pom pom makers, both large and small, to make fun and interestig animals.
You can cover wire hangers to hang clothing on, as well as making holiday items using yarn to cover styrofoam like wreaths, bells, eggs, etc.
You can also use a horse rein, also known as a "knitting knobby"* to make long cords which you could use to make into rugs, baskets, placemats, potholders , and other objects.
If you are making children's projects, you could use yarn to decorate paper plates, making chains for hanging, or hearts.
These are just some ideas, but I am certain that there are many more.
*Many had these as children.