Intent on the game, a young boy carefully takes aim and shoots a marble with a quick flick of the thumb. The prizes he hopes to take home drift in the air, giving form to his thoughts — a colorful cat's eye and a crystalline cleary. Many of us played this marvelous game. We loved it! says Guatemalan artist Mario Sergio Aviles. The transparent glass globes seemed to enclose a piece of the sky. Working in oils on canvas, he shares memories of a happy childhood. Titled Jugando cincos in Spanish.