We have some very tall grass [[probably close to 3 feet tall) in the pasture next to our barn. One day, I was standing by the barn looking out over the field, and suddenly, from down in the long grass, two 5-month-old kittens lept skyward to try to catch a butterfly that had passed above their heads. It was hysterical to watch, as they tried to catch the butterfly. One second, you'd see them, and the next second they'd be back down in the grass. Kittens are definitely the most fun animal babies to watch.