One of ET's younger-generation supporters is screen actress Danica McKellar, seen here helping move a few dolphins around in the ET office. Originally best known as "Winnie Cooper" on "The Wonder Years", Danica launched her own "Teen Scene" series and went on to star in TV special productions and in 2003 is in the hit show "West Wing". Danica and her sister Crystal were originally among the more than 100 child-stars who sang in the Earthtrust benefit "Let it be Earth Day Every Day". She remains a key ET person.

Click here to find out How You Can Help Earthtrust.