These marbles feature an added surprise - a real insect or bug specimen encased within! Play fun games while learning about the natural world with these Geoworld Safari Ltd Bug Marbles! Characteristics: This set includes 8 different bug marbles including insects and spiders, with their scientific names detailed on the packaging. Perfect for making science learning fun! Size: Box measures 8 inches long & 1 inch wide. Each marble is approximately 1 inch in diameter. Age: 6 years and up