LEGO Christmas MOCs
Christmas builds in LEGO with free instructions: Santa Claus with his sack of presents, the Grinch in his Santa suit and the Polar Express locomotive on a snowy track. Each is a fan-designed MOC in standard LEGO pieces with 3D steps and a full parts list, ready to build before the holidays.
Unofficial fan builds, not LEGO sets; the films and characters belong to their owners.

Building guideThe Polar Express Locomotive174 pieces · 13 steps

Building guideSanta Claus210 pieces · 16 steps

Building guideThe Grinch181 pieces · 15 steps
Questions
Is there an official LEGO Grinch or Polar Express set?
No, not as of 2026: both are only fan proposals on LEGO Ideas. These are free fan-made MOCs you can build from standard pieces now.
Can I ask for a Christmas build?
Yes. A sleigh, a snowman, a tree: type it into "Ask for any build" and it is designed for you with instructions.