If it's kids, I might put phonics in, i.e. 'ph-', '-an' etc. They have to say a certain number of words to get the square.
If it's adults, I put in words that begin or end with _. Again, they have to say a certain number of words to get the square.
How do they land on squares?
Get some tissue paper, scrunch it up into a ball, pour water on it and get Ss to throw it at the board!
Geoff Richards, Udon Thani, Thailand,