Free Universal Construction Kit: 3D-printable adapters to connect Lego, Duplo, K'Nex, Stickle Bricks and other systems
The Free Universal Construction Kit is a 3D-printable set of adapters that allow you to connect 10 popular construction toy systems, including Lego, Duplo, Fischertechnik, Gears! Gears! Gears!, K'Nex, Krinkles…
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Free Universal Construction Kit: 3D-printable adapters to connect Lego, Duplo, K'Nex, Stickle Bricks and other systems Rob Beschizza 7:10 am Tue Apr 28, 2026 The Free Universal Construction Kit The Free Universal Construction Kit is a 3D-printable set of adapters that allow you to connect 10 popular construction toy systems, including Lego, Duplo, Fischertechnik, Gears! Gears! Gears!, K'Nex, Krinkles (AKA Bristle Blocks/Stickle Bricks), Lincoln Logs, Tinkertoys, Zome, and Zoob. F.A.T. Lab and Sy-Lab are pleased to present the Free Universal Construction Kit: a matrix of nearly 80 adapter bricks that enable complete interoperability between ten* popular children's construction toys.
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