Chang Shih-tzung, who has a Ph.D. in education from Columbia University and has engaged in toy design and research for a number of years, says that so-called "educational" toys are not necessarily good toys since toys that are too difficult or complicated will cause the child to feel frustrated or timid.
哥倫比亞大學教育博士，從事玩具研究、創新多年的張世宗表示，未必所謂益智玩具，就是好玩具；因為過於困難、複雜的玩具，會讓孩子產生挫折感而卻步。