Marvel at the ingenuity of Great Ball Contraptions, intricate systems where LEGO balls traverse through complex pathways.
The site is dedicated to providing information and resources to participate in the fun of Great Ball Contraptions
Welcome to the Great Ball Pit!
Great Ball Pit, A Lego Great Ball Contraption Blog.
The aim of Planet GBC is to build a central hub focusing on one of my favorite hobby, Lego ® Great Ball Contraption (GBC).
Build Great Ball Contraptions from existing LEGO sets.