The latest addition to toilet-training literature takes the train analogy and rides the rails to success . . . one hopes. A toddler engineer is playing with his toy train and stuffed giraffe, lion and elephant (all diapered) when he feels a sudden urge. Opening the bathroom door leads him to the station where the Potty Train awaits with Conductor Lion beckoning him aboard. Giraffe doesn’t quite make it in time, but that’s okay—learning to ride takes a while. Sometimes there are leaks, and sometimes nothing seems to be happening at all. But the potty train keeps going, and soon, the little boy will be able to ride it all the time. As he disembarks with his stuffed friends, the toddler is surprised to see that they are all now wearing underwear. Young children will enjoy the inventiveness of Anderson’s acrylic illustrations, which incorporate everyday objects and toys into a fantasy train ride that marks the journey from diapers to “Undie Junction.” One page is potentially problematic, however, as it shows the train about to chug through a pipe tunnel. Nonetheless, train enthusiasts will toot “Chugga chugga poo-poo.” (Picture book. 2-4)