Hi Jopie, thanks for the warm welcome!
Yes i did, i was amazing to see how a bunch of people in their midlifes moved balls from one end of the room to another without any obvious purpose to it hahaha.
Actually, the video that i saw was from the American version of GBC and it was very inspiring.
As i said, i want to build my own ball contraption, but i have a long way to go since i need to purchase everything i need to make it.
In wich part of the forum can i post questions about Lego parts? Foreinstance, i saw a caterpillar track (3873) that can bring my balls up to height, but i dont know wich gear to buy to make it run.
Any help would be appreciated.