I am definitely thinking that the lexan will be used for some sort of see-through wall. Luckily for us one of our sponsors is GM Plastics and has been suppling us with lexan for our robot (which we mainly use for armor
. I imagine a 10' foot high wall raised on a ramp where robots will have to put something over. There is very little which we can figure out from this list, because it is just that a list of materials (however that is a awfully large amount of wood for 1/2 of the field).