- The ABS material is healthy, non-toxic and safe for infants. 2. Fine workmanship, moderate size, very suitable for baby’s hands, very comfortable to hold. 3. When the children recovered their strong, spiky “feathers” on the back of this friendly hedgehog, they established good motor skills 4. The colorful feathers of hedgehogs also help children develop color recognition, classification and counting skills 5. The feather pen that is easy to grasp is just the right size for small hands