Find all your DIY electronics in the MakerShed. 3D Printing, Kits, Arduino, Raspberry Pi, Books & more!

Not a physical product, of course, but a physible one, consisting of almost eighty free 3D models from anonymous designers at the Free Art and Technology collective :

The Free Universal Construction Kit offers adapters between Lego, Duplo, Fischertechnik, Gears! Gears! Gears!, K’Nex, Krinkles (Bristle Blocks), Lincoln Logs, Tinkertoys, Zome, and Zoob. Our adapters can be downloaded from and other sharing sites as a set of 3D models in .STL format, suitable for reproduction by personal manufacturing devices like the Makerbot (an inexpensive, open-source 3D printer).

I’d vote against the naughty acronym, personally, but they do thrive on controversy, those F.A.T. peeps.

The Free Universal Construction Kit

Lego bricks builders wish they could buy

Sean Michael Ragan

I am descended from 5,000 generations of tool-using primates. Also, I went to college and stuff. I write for MAKE, serve as Technical Editor for MAKE magazine, and develop original DIY content for Make: Projects.



  1. Chris says:

    This is so cool. Between my childhood Lego collection, my brothers childhood K’Nex collection, and my son’s Duplo collection… the possibiities are endless. Just the Lego/K’Nex adapters are worth their weight (or double, or triple their weight) in gold. Now to convince my wife I need a makerbot…

  2. LDM says:

    No love for Construx?

    1. Yeah I was looking for that too.

  3. ZP says:

    If only I was still a kid….Oh wait, I can be! This is a total want. When will they be available in a store near me?

  4. JBee says:

    Genius idea but are they serious with that name? I’m not a prude but it shows zero respect for the kids this is aimed at. (And if they are solely targeting nostalgic grown-ups then they are idiots for jeopardizing a huge potential audience.) That acronym is a dealbreaker, sorry.

  5. Eric says:

    They missed zax too.

  6. MikeIa says:

    And I thought I was hot stuff the day ~35 years ago that I discovered that the Tinker Toy sticks fit into the bolts from my Playskool Wood Toy Builder set….

  7. [...] The project is called subpixel, and the tool itself is made from a piece of laser-cut acrylic, nine razor blades, and nine rubber bands. You may recall the F.A.T. collective from their recent 3D-printable universal construction toy adapter set. [...]

  8. [...] The Free Universal Construction Kit allows you to bind multiple construction sets together with these 3D printed adapter pieces. There’s no stopping you now! Via MAKE Magazine. [...]