A bored brother and sister step outside on a dark, cloudy day, hoping to find something fun to do. The moment their feet touch the ground, the gray grass turns green and alerts the flowers that the children are out. Joy spreads upward to the trees, then to the wind, then to the clouds and finally the sun. As the children watch the world awaken around them, they discover that even the gloomiest day can come alive when they choose to step outside and play.