Most listings describe moldable or kneaded erasers as made from rubber. One listing specifies PVC (polyvinyl chloride).
Kneaded erasers are designed to be molded and reshaped to renew the surface — you can pull, twist, and knead them to refresh the erasing surface.
Yes. Some kneaded erasers glow in the dark, and others are scented — for example, sets with glow-in-the-dark colors and packs featuring fruit scents are described.
Sizes vary but commonly fall around 1 to 2 inches. Some listings note dimensions of about 1.25 inches square, depending on the set.
Descriptions indicate kneaded erasers pick up pencil marks precisely and are said to leave no crumbs when used as intended.
Several sets are designed to be disassembled or interlocking so kids can build 3D shapes, mix scented pieces, and use erasers as small desk pets or collectibles.