How many movies have Dick Lieb and Tony Geiss collaborated on?

They have worked on 3 movies together! Their first movie together was Don't Eat the Pictures: Sesame Street at the Metropolitan Museum of Art (1983) while their highest rated movie together was Big Bird in Japan (1988). They have not worked together since Sesame Street: Elmo Saves Christmas (1996). They are most known for their tv movie films together.