I created this game to help children struggling with the idea of “two negatives making a positive.” Two plus and minus dice tell players whether they are
- adding or subtracting and
- a negative or a positive number.
The numbers used are small (a 1-6 spot dice) because this game is to reinforce understanding of direction of travel. The idea of a tower block with an underground car park is used because the subterranean numbers are the negative ones.