So many versions. The one I remember from my childhood is kinda creepy now if I think about

Down by the riverside hanky, panky
Where the bullfrogs jump from bank to bank
Saying oosh, oosh, osh, osh
Della Della ding dong
Daddy smells like King Kong
Coca-Cola burns you up
Now you're drinking 7-up
7-up has no caffeine
Now you're drinking gasoline
Gasoline was made for cars
Now you're eating candy bars
Candy bars have too much fat
Now you're driving a Cad-i-llac