Ehrenfeucht-Fraisse game

Ehrenfeucht-Fraisse games are like puzzles. In the game, there are two players. One of the players has a pattern and the other player has to figure out what that pattern is. The first player chooses two shapes, like a square and a circle. The second player has to come up with two more shapes that fit the pattern. The player with the pattern wins if they can find shapes that match the pattern they created. It can be challenging, but it's a lot of fun!