I once read such an interesting article about a study where different groups had been given huge lego bricks (or something similar) of different colours, i.e. one group was given blue bricks, another group was given red ones, and so on. The results were fascinating; turned out people built very differently depending on what colour they had been equipped with - and n.b. this was a scientific study and the tendencies were consistent over time and for different sets of people: Certain colours "wanted to" climb the walls to touch the ceiling, others "wanted to" form a circle on the floor, and so on.
I'd really like to read about it again but I have no idea even if was a Swedish study or what... Anyone recognise this?