At the beginning of the year all over Japan, one can see a load of paper bags lines up in front of retail shops. All the bags are sealed so that you cant see whats inside. The bags are called Fukubukuro and would be literally translated as "Bag of good fortune."
The idea is that some of the bags contain stuff valued at more than the price written on the bag. Many bags contain valuable goodies - but most contain stuff that the retail store could not get rid of - meaning you end up with bag/s of poo.