Above you see a 1973 animated short by John and Faith Hubley, starring the voices of their preschool daughters, Georgia and Emily. “Cockaboody” was in heavy rotation as between-movie filler on HBO, back in the early 1980s.
This was the second cartoon the Hubley’s made using the surreptitiously- recorded voices of their kids. Years earlier they created “Moonbird,” using the voices of their sons, Mark and Ray, and took home the OSCAR for best animated short in 1959. You can see it below.