Hex Bug Warriors Battling Robots Battle Stadium - Viridia vs Bionika HexBug - Warrior Battling Robots Stadium - Viridia vs Bionika Battling Robots measure approximately 3 inches long. Part of the Hexbug Warrior Battling Robot series. Includes 2 Warriors [(1 Viridia (green) and 1 Bionika (blue)] AND stadium. Not recommended for children under 3 years of age