Knickerbocker made two sets of Sesame Street wind-up toys: Sesame Street Swimmers in 1978, and Sesame Street Hoppers in 1979.
The three Swimmers -- Big Bird, Cookie Monster and Ernie -- can swim in the tub or pool. The three Hoppers -- Big Bird, Cookie Monster and Oscar the Grouch -- can hop across a table or floor.
Sesame Street Swimmers
Sesame Street Hoppers