Enjoy with your Kids!!
Watermelon Chess(西瓜棋) is a two-player abstract strategy game from China where it is known as Xi Gua Qi. It is also known as The Surround Game and Globe. It is related to the Bear games of the ancient Romans. In fact, the board is exactly the same as one of the Bear Games. The difference is that in Watermelon Chess each player has six pieces, whereas in the Bear Games, there are three hunters played by one player, and one bear played by the other player. Furthermore, in the Bear games, only the hunters can surround and immobilize the movements of the one bear; the bear merely moves to avoid this as it is impossible for the bear itself to immobilize any of the hunters. In Watermelon Chess, every piece can participate in immobilizing the other player's pieces; furthermore, surrounded enemy pieces are captured.
The Go variant Sz'Kwa uses the same board.
Watermelon Chess is not related to Chess even though it includes the word "chess" in its name. The boards and pieces are completely different from one another. In Chess, the goal is to capture the King, whereas, in Watermelon Chess, the goal is to capture the opponent's pieces and reduce their numbers to two.
--http://en.wikipedia.org/wiki/Watermelon_Chess

西瓜棋遊戲,每方6顆子,每回合可以移動一顆子,當子被敵人包圍無法移動,則這顆子就挂了,當其中一方的子少于兩顆就輸了。走法是一人一步,吃法參考圍棋。