Chuggington (2008)

Season 1: Episode 26

Children from Chuggington School are coming to the Safari Park, and Mtambo is training Wilson and Brewster to help out as junior guides. Mtambo tells them it's important to pay close attention to what he tells them about the animals, as they in turn will have to pass on the facts to the children - who will be tested afterwards to see how much they've learned.