Big Bird's Big Water Show is a Sesame Street bath toy set made by Knickerbocker in 1978. A Knickerbocker catalog describes the set:

New tub toy is packed with action features: Big Bird rides water skis, pulled by a friendly dolphin; Oscar the Grouch has his own trash-can shower; Cookie Monster sits in a sea horse float that squirts water when squeezed. The large pontoon float has a diving board and water slide the whole gang can use.