Chicken (gai or conkers)

The children sometimes play a game called chicken (in Thai that is Gai). Chicken grass seems to grow in our garden and the children of the village collect it. It is a strong grass with a large knot at the end. One child holds their grass out and the other hits it with their piece of grass, the winner is the one with grass knot still on grass stem, I am sure that I used to play something similar!