Discover the 10 most amazing LEGO ball machines ever !
Get building instructions from Planet-GBC for most of these machines to reproduce them!
What about you? What is your favorite GBC module ? Share your own TOP10 or your preferred GBC modules in the comments section !!
Buy Lego Technic bricks at the best price to build your GBC modules (AMAZON Price Comparator):
https://www.planet-gbc.com/legotechnic-pricecomparator
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