My current story is about a group of average 11-year-old boys. They live on a planet with two suns, one purple, one white. They harvest huge flowers with giant petals which their village uses for everything from food to clothing. Think of an undeveloped society, a village of huts deep in the forest with a population of around 500 people. Animals are different and have their own names. The boys call each other bog face and glump head, then apologize when they cross the line by placing the heal of their hand to their foreheads and saying, "Wiseness." Most other terms have just appeared for me, but I'm having trouble with something equivalent to "cool." Kids say cool all the time. There are many scenes when the boys should be saying it and as of right now, I'm using cool. But it just doesn't fit and I'm stumped. Help?