Okay, I was in the middle of the Carpenter step of the TicTacToe mobile app. I realized there was a lot I didn't think about in the Architect step. So, I did another Architect video talking about ideas with my friend Brad. I'll leave most of those details to the video.
But one of items that emerged is that it really makes sense to make a physical board also.
Tic Tac Toe, as a game, is really for playing with kids. It is a great way to introduce children to basic board games. So, the board will be designed for use by a parent to play with a child. That means:
Okay, I've got another project I'm doing. Hopefully, that doesn't stretch things out too much.
EDIT: since writing this, I've had a prototype made: