Animal Crackers

Animal Crackers follows the Huntington family whose life is turned upside down when they inherit a rundown circus and a mysterious box of Animal Crackers, which magically change the person who eats them into the animal they have eaten — including monkeys, giraffes, lions, elephants, tigers, rhinos and bears. They must save the circus from being taken over by their evil uncle Horatio P. Huntington (McKellen). Read more on Wikipedia.