Bahahaha derp. Sorry I initially did write all that out, but then accidentally refreshed the page and had to rewrite it and forgot to put that part in.
The labs are designed to be collaborative between the students so 1 kit for every 2-4 kids is good. One kid is the builder, the other is the journalist who documents their progress, what they think the bot will do based on their programming and what the bot actually does.
RE: VEX Robots. Practical STEM in your classroom!