It has never been easier to build a complete Great Ball Contraption (GBC) loop yourself! GBC 34 features a nice tilt lift module which can directly be inserted in any GBC layout. Using a more accessible LEGO Set and focusing on one single mechanism makes that this GBC by far one of the best GBCs to get started.
This GBC is entirely built using only parts from the LEGO First Responder and can be referred to as model C of the 42075. This GBC makes sure you master the GBC building techniques and tricks so that you eventually also can build your own GBCs. The whole machine is powered by hand on default but can easily be upgraded with any LEGO motor (more information in the building instructions).
The perfect Workshop Module for GBC Events
Learn about the wonderful world of mechanisms by building our GBC 34 Tilt Lift Workshop Module which features a nice efficient Tilt Lift mechanism. While building GBC 34 you will learn basic engineering at its best. Think of gearing, forces, mathematics, sturdy constructions, automation, cool mechanism like the slide mechanism, synchronized levers and so much more!
The GBC Balls are being hold in the beginning of the module until the tilt lift arm comes down and picks up a batch of GBC Balls. It then rises the tilt arm again until the balls start to roll and exit the module. This GBC can easily be inserted in a bigger GBC layout without any other modifications. In this way you can easily combine GBC 34 with other GBC Modules. How long can you make the loop?! :)
Fun Fact
Designing a GBC from such small part inventory really took all the ingenuity and experience we gathered over the years. Parts are being used in a new way and many problems had to be solved for getting this GBC to work and making it sturdy and reliable. Using over 95% of the parts that come with the set we really did get the best and most out of the original LEGO 42075 set. There was a real challenge to build a GBC from such a small set but we succeeded again.
Building Instructions Preview
See the building instructions previews on the left or simply try these free building instructions by adding them to your cart.
Upgrade your GBC 34 Tilt Lift Workshop Module
In the building instructions is explained how to easily upgrade the GBC 34 Tilt Lift Workshop Module with various parts.
Power & Automate
How cool is that!
Learn more!
Get the accessories
We have GBC Balls, handy electronics products and fun accessories available. Take a look at all our accessories!
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Haydn Bold –
An enjoyable and fun build. Recommended
Matt Elder –
This was my first GBC that I made and seemed like a great entry point (can never argue with FREE instructions). It was a medium challenge technic build that took a couple of hours to build.
For a full review, check out my website which also has a Youtube review:
https://www.mattelder.com/lego-videos/what-is-a-lego-gbc-great-ball-contraption-review-time-lapse-fire-rescue-first-responder-to-gbc-34