K'nex Codsworth | Fallout 4

About: Excuse the cringe in my old instructables, I was 14.

"That means you're, erm... two centuries late for dinner! Perhaps I could whip you up a snack? You must be famished!"

Codsworth is a Mister Handy robotic butler for the Sole Survivor's family before the Great War and survived the nuclear explosion. Codsworth lives in Sanctuary hills and can be potentially recruited as a companion and only appears in Fallout 4. Mr Handy's are a series of robot's produced before the Great War and are named Mr Handy due to their large number of hands. They are fully capable of keeping themselves in working condition, can perform many actions with their range of tools, hover a few feet off the ground and can even help around the house! Read on if you want to know how to acquire your own personal Codsworth!

This build uses only 88 pieces. There are no modified/broken pieces however some pieces are slightly bent, but not enough to do any noticeable permanent damage to them. The robot can turn vertically, and each eye an arm is individually pose-able.

Let's get building!

Step 1: Piece Count


  • 6x Black Rod (16mm)
  • 18x Silver Rod (32mm)
  • 1x Grey Rod (190mm)


  • 4x 4-Slot Black Connector
  • 9x 4-Slot Silver 3D Connector
  • 1x 7-Slot Dark Blue 3D Connector
  • 4x 2-Slot Light Grey Connector
  • 5x 1-Slot Grey Connector


  • 1x Bronze Clip
  • 2x Silver Y-Clip
  • 12x Black Y-Clip
  • 4x Black Socket Joint
  • 15x Black Ball Joint
  • 1x Headtop Translucent Red
  • 3x Hub Grey (18mm Diameter)
  • 2x Wheel Open Centre Black (25mm Diameter)

Total: 88 Pieces

Step 2: Stand and Hovering Device

Taking a page from the eyebot's book, the spherical shape of Codsworth's body was made with 3D connectors. The pictures explain the steps and guide you through the build. Build what you see.

Step 3: The Arms

What would a Mr Handy be without its hands? Well, it certainly wouldn't be very handy! Again, build what you see.

Step 4: The Head

This was probably my favourite part to build as the 'eyes' give the robot so much character! Just build what you see.

Step 5: Extras and Posing

The clip at the top just keeps the head from falling off if somehow Codsworth ends up upside-down. The arms are posed just like the in-game robot himself. You can easily change it though if you don't like how it looks!

Step 6: Finished!

Thank you for reading through this Instructable. If you have built this, please show me a picture down in the comments! Also tell me what you think of it and what I could do to improve. If you enjoyed this build, please consider subscribing to me, it means lot! I post K'nex Instructables very often. Bye, and have a great day!



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    10 Discussions


    3 years ago

    that looks awesome! very inventive way to use the pieces, very nice keep it up!

    1 reply

    3 years ago

    Finally, some to fill my craving of fallout With knex!

    1 reply

    3 years ago

    :D I built a couple other fallout things too. One is already published , the eyebot , and two still need instructions. ;)


    Reply 3 years ago

    Thanks for the comment(s) xD I was worried no one had seen this, I was quite proud of this one.


    3 years ago