One of the best designed board books to come along in quite a while, this makes Crews' classic picture book Freight Train (1978) interactive by letting children open certain cars to peek at what's inside. This is no lift-the-flap (and eventually rip-it-off) book. Every other page is twice as thick and split in the middle, allowing the outside half of the page to slide sideways (as the doors slide on the box car of a train) to reveal another, smaller page inside, on which the car's contents are shown. Most train books, even picture books about trains, have a text that's too long for the attention span of the two- and three-year-olds who usually request them. Here the text is simple, with phrases that can become a question-and-answer game. On one page the text begins, "The purple box car carries . . ." When the car is slid open, it continues "toys and books." By the second reading, even toddlers will be finishing the line, or at least taking charge by pulling the door open to find the answer. Given the perennial appeal of trains for young children, the fun of sliding the doors, and the satisfaction young children take in revealing what is hidden, this little book really delivers. A "second generation" board book that isn't a diminished version of the original picture book, but rather a playful first step for younger children.

纸板书，设计了可以抽开的活页，抽开可以看到里面的货物。