With elves hard at work on a production line, the puzzle was much more difficult than people originally thought.
Teddy bears, jack-in-the-boxes, dolls houses, and toy planes, submarines and tanks are all trundling along the conveyer belt, making the robot fiendishly tricky to spot.
Of course we can't sum-up Christmas mind-benders without mentioning Dolly.
In this eye-popping puzzle there is a solitary doll waiting to be found.
Hidden among an enormous glut of teddies, dinosaurs, trains, cars and spaceships, Dolly was actually a bit of a pain in the neck to discover.
Another favourite is the lost Good King Wenceslas of the famed Christmas carol.
A spokesman for Optical Express, who created the puzzle, said: "Having good vision won't necessarily help you solve our mind-melting puzzle, but it will give you a head start."