There has been some rumors that I am not capable to make new quizzes. This is NOT true! I come back with new quizzes. For warm-up, let's stick to 4.5v battery wagons again! After the successful quiz N1:
which was followed with a new item on bricklink:
https://www.bricklink.com/v2/catalog/catalogitem.page?P=x488c03&idColor=5
now again: what do you find uncommon in this photo?
I have told the answer to few friends. Please do not spoil. If you know the answer, you can pm me then I comment that you know the answer so that people can think about this photo for few days.
There are gonna be harder quizzes, so prepare for them! ;-) :-)
Have fun.