After spending nearly three hours in prosthetic and makeup dressed as The Grinch and Cindy Lou Who, the Curry's revealed their identities to 2,000 people.
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The event in Oakland included ornament making, family portraits, cookie decorating, and even a visit with Santa Claus.
Families also went home with gifts like toys and games.
This was all made possible by "Eat Learn Play" - the foundation by the Curry's that's focused on youth in under-served communities.
The video is from OpenLight Films, and the pictures in the video slideshow are from Charlotte Fiorito and Noah Graham, respectively.
WATCH: Video slideshow of Curry family as Dr. Seuss characters down below.