绘本故事《The Berenstain Bears Go Up and Down》- 适合

绘本《The Berenstain Bears Go Up and Down》，

绘本内容

One bear goes up. Two bears come down. But when one bear goes down the up, chaos ensues! From Stan and Jan Berenstain, masters of the super-simple, comes an Early Step into Reading/tm/ book that features those marvelous magic moving metal stairs so fascinating to all children–the escalator!