For Christmas I was given some Lego in order to make a Latin Square. I had never heard of the term before, but Lego is always fun. A Latin square similar, but more simple, than Sudoko...every row and column can only have one of every color.
I was putting mine together and realized, "Oh! This is a trip around the world block!"
So now you know...in math land, Trip Around the World blocks are referred to as Latin Squares.