It’s fun to play Interval Symbol Scrabble with your cards.  It’s also a good exercise to write it out. Make the interval symbols ascend from left to right and from bottom to top.  You may only have 7 symbols in a continuous line horizontally or vertically and in any 3 x 3 square, the center square may not be filled (note the box below in the center and the row across of 7 that can’t be added to on the left or right).  Below you can see two types of up 2 and two types of stay the same. See how many different symbols you can use and much of the grid below you can fill up! ​