Here is information on a number of events.
From Kevin Naughton
My lot get 6 of the green plant support sticks plus a load of rubber bands and form them into a pyramid. You can then get 4 pyramids and combine them into a "super pyramid". 4 super pyramids fit together to form a "mega pyramid", etc., etc. Its amazing how big a pyramid you can get with a Pack of Cubs and an hour, and the structure looks so complicated that people who aren't in on the "kit construction" think it's amazing.
Model made with bamboo chopsticks.