That sounds like a fun one! I’ve never heard of anything like that one. I need help remembering the layout of one. It was made up of 10 squares – like an enclosed tic-tac-toe board with an extra square on the top right hand side. The squares were numbered 10-20 and so on through 100. I remember that 10 was the center square and 20 was top left, with 100 as the extra square. Can anyone help me with this – i’d like to teach it to my daughter!!