Traditional educational toys from even further back though, such as ho-shih-tzu, chin-ch'an-t'o-k'e, and kuei-fei-ch'eng, are unknown even by name to most people nowadays. Even those like the tangram and the "nine joined rings," that are still known, have faded from living use, and only remain in the old books to edify us.
然而更古董的合十字、金蟬脫殼、貴妃秤等傳統益智童玩，現代人可能連聽都沒聽過；連較耳熟的七巧板、九連環、華容道，也離生活益發遙遠，只能在漫漫古籍中供人瞻仰憑弔了。