Little Choo wants to be just like his father Papa Pufferbelly, but pulling a line of freight cars up a steep mountain might be a little too much for the small engine.

"Raj has one steadfast rule: NEVER USE THE BATHROOM AT SCHOOL! Of course, it can be challenging to follow this rule. After all, sometimes, a person's gotta go! So Raj has come up with a series of how-to rules to help him "hold it" -- avoid all liquids; stay very still at recess; squeeze your knees tight, stay away from funny friends who might make you laugh too hard, and at all costs, avoid sneezing. But, inevitably, Raj ends up accidentally breaking...