Square Pencil Erasers for Picking Up Pet Fur

I was going through my daughter's room and under her bed, when I picked up an eraser to kind of sweep a few bits of debris off the floor. It picked up fur like a dream! I used it on her carpet, as I was sitting on the floor going under her bed and sorting clothes, etc.

I would never have thought this little thing, which I have dozens of laying around, would do such a good job with dog hair on the carpet. When I was through I just rinsed it off and I will put it up for future use.