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.
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.