Bring some of the beauty and history of sundials into your garden with the Frog Sundial. The sundial is the oldest known device for the measurement of time and the most ancient of scientific instruments Bring some of the beauty and history of sundials into your garden with the Frog Sundial. The sundial is the oldest known device for the measurement of time and the most ancient of scientific instruments. Color: Copper Verdigris UPC: 719455004937