The Thumb Thumbs are a group of robot henchmen that belong to Floop.
A Thumb Thumb was given to the Cortez family to serve as a waiter for them.
Spy Kids 2: The Island of Lost Dreams
In Spy Kids 2, The Thumb Thumb waiter seen at the end of the first film is seen giving soup to Juni after he was fired.
Another one can be seen pushing a clothes rack in Floop's Castle.
Spy Kids 3-D: Game Over
In the 3D version of Spy Kids 3, Thumb Thumb versions of certain characters appear in a storybook Floop is reading to the audience.
Spy Kids: All the Time in the World
Spy Kids: Mission Critical
Most Thumb Thumbs are pretty clumsy, but what they lose in coordination, they make up in loyalty and passion. They are passionate servants who love to make their masters happy.