the Seals on Bus

"The seals on the bus go "errp, errp, errp" All through the town." Two children and their parents board a city bus on their way to a party. At the next stop, who should get on but a group of seals, who holler "errp, errp, errp" at the top of their lungs. Each time the bus stops a new kind of animal joins the passengers and adds to the din, to the children's delight and the parents' annoyance. But when several hissing skunks want to come aboard, even the children cry "help! help! help!"