Designed simply from a piece of board and some beads, the toys present questions on the natural and social sciences to be answered by children.
書玩具的材料是一塊塑膠板，再配上小鋼珠和珠算子。把圖畫精美的問題卡固定在板上，用杓子取小鋼珠投進問題的洞口，小鋼珠便會通過槽溝，從正確的答案洞口滾出。