I would really have expected atleast a small number of people to have carefully looked to workout the distribution and whether there were a higher density of on

I would really have expected atleast a small number of people to have carefully looked to workout the distribution and whether there were a higher density of one type (e.g. small) at one position. I imagine the use of a bag rather than a Jar as per the usual school fair game could make spotting these harder though (unless they're allowed to pick up the bag).