Nick wants to change his life. For twelve whole years, he's done waht his hard-working immigrant parents want him to do. Now he's looking for his own American dream and he thinks he's found it. The local baseball team is having a batboy contest. Nick's goal : to be a Mudpuppy for a day! But the contest is on a Saturday, the day Nick has to work in his father's shop. And there's one other tiny - well, not so tiny - problem : a 2,000-pound rhinoceros named Tank.