How many movies have Christine Ferraro and Ken Diego collaborated on?

They have worked on 4 movies together! Their first movie together was Sesame Street: Kids' Favorite Songs 2 (2001) while their highest rated movie together was Sesame Street: Elmo's World: Happy Holidays! (2002). They have not worked together since Sesame Street: Elmo's World: Let's Play Music (2010). They are most known for their family films together.