Do you play Battleship Game with your children?
I used to play it often when I was a kid.
So today I thought to introduce the game to my daughter. As we were in a hurry and did not really have any rulers or squared paper on hand I just drew the grids freehand.
You probably know the rules anyway – each player has a certain number of ships which they can put anywhere on their grid and they then have to guess where their opponent has put theirs. We just kept it simple – all the ships were subaramines of one square each.