What can make a hippopotamus smile? What can make him walk for a mile? It's not a party with paper hats. Or cake and candy that can make him fat. 'Cuz that's not what hippos do. They ooze in the gooze without any shoes. They swim underwater till their lips turn blue. 'Cuz that's what hippos do! What can make a hippopotamus smile? What can make him walk for a mile? It's not a tune on the old violin. Or listening to the whispering wind. 'Cuz that's not what hippos do! They ooze in the gooze without any shoes. They swim underwater till their lifts turn blue. 'Cuz that's what hippos do!