The NSI Smithsonian Robo Spider lets you build your own spider that s capable of moving on its own. It features eight multi-jointed legs that duplicate the walking movement of real spiders. This battery-operated spider kit comes with 66 plastic robo spider parts a gearbox with on/off switch assembly two battery terminals and a feet tube. This set also includes a 23 by 17-inch full-color poster that can be hung up on a bedroom wall. It is recommended for kids ages 8 and up to help learn not just about spiders and how they walk but also about robotics assembly and more. Adult supervision is required when building this Smithsonian Robo Spider. Good Unisex gift for boy or girl.