The children work on refinement of movement activities year round. The materials help the children to refine small movements of the hand, to exercise and develop hand-eye coordination, and to coordinate both hands working together. Refinement of movement activities also aid the children in concentration, growth and independence. Working on inserting coins or washers into a slotted box enhances the pincer grasp and hand-eye coordination, while opening and closing the box with a sliding lid encourages both hands working together.