Quoridor Junior
Tax included.
Quoridor Junior is the classic abstract strategy game where you are trying to get your piece across the board to the other side. Sounds simple, but on your turn you have two options, move your piece, or place a wall onto the board. This ratchets up the strategy quickly because now you have to weigh the options between throwing an obstacle into the path of your opponent, and moving yourself closer to victory. Whoever manages to make it to the other side is the winner.