The first class was amazing. The kids learned far more than even I anticipated. Almost all of those students are now engineers and computer scientists.
The first time we used Zamor spheres, which turned out to be problematic. The size is not ideal for a GBC. This time I'd like to use the same balls used in adult collaborations, but I'm having trouble sourcing them. I see them at Bricklink, but they are expensive. We want to do a 12-module loop, which would require a fair number of balls. I'm thinking 120 minimum. Does that sound about right? Any idea where we can get that many balls at a reasonable price? The class is starting to price itself out of existence.