In some of our designs we use our own Xylophone Keys to add sounds and tunes into the GBC Models. To make sure the keys fit within our design it’s important that the sizes, thickness and holes match up perfectly. To make sure that you get your GBC working as well, we have Xylophone Keys available which meet the requirements.

Our Xylophone Keys are the perfect fit to the LEGO standards. They are just a little bit smaller than 2 studs which makes it really easy to build into your LEGO designs. The small clearance created between the 2 studs is perfect to make sure that the Keys can vibrate freely and create beautiful sounds and tunes.
The colorful Keys range over a complete octave using 8 full notes from C D E F G A B C. This makes it possible to play fun noticable tunes or come up with your very own musical composement.

Our upcoming GBCs will use these Xylophone Keys to make beautiful and playful tunes by dropping GBC Balls precisely on command. In this way you can make your own autonomous music machine or create a musical rainbow GBC staircase. How cool is that!

List of GBCs which use the Xylophone Keys

Preview

Rebuild your LEGO sets ...

Explore the wonderful world of Great Ball Contraptions and start engineering with our building instructions (Preview) right away! Get many more build and play hours from the LEGO set you already have! All our models are so called Alternate Builds, which are models entirely made from parts of an existing LEGO set. This makes it really easy to get yourself started today with the greatest feat of LEGO engineering there is. But it is so much more than that.

Learn more on our building instructions

The Xylophone Keys all over the world