The boys played endlessly at tracking and hunting, and both boys and girls played at finding and digging up edible roots. They played at tree climbing, cooking, building huts, and building other artefacts crucial to their culture, such as dugout canoes. They played at arguing and debating, sometimes mimicking their elders or trying to see if they could reason things out better than the adults had the night before around the fire. They playfully danced the traditional dances of their culture and sang the traditional songs, but they also made up new ones. They made and played musical instruments similar to those that adults in their group made. Even little children played with dangerous things, such as knives and fire, and the adults let them do it, because ‘How else will they learn to use these things?’ They did all this, and more, not because any adult required or even encouraged them to, but because they wanted to. They did it because it was fun and because something deep inside them, the result of aeons of natural selection, urged them to play at culturally appropriate activities so they would become skilled and knowledgeable adults.