Guidecraft Xylophone Ball Bopper G5078 Ball sorter flips over to become a xylophone, includes base, three wooden balls and a mallet, for ages 18 mos.+ Pound the wooden balls through the cutouts with tough vinyl rings Flip base and adjust cords to turn into a xylophone Material: Rubberwood stained with low VOC aniline dyes to prevent chipping Educational Focus: Improves fine-motor skills and hand-eye coordination