Bring out the inner engineer in your child with the new Techno Gears Lights & Sounds Construction Sets. Among these collectible, fascinating kits is Rockin' Rover, with more than 80+ colorful construction pieces like translucent colored plastic and flashy chrome parts, rotating gears, smooth-moving chains, and more! The mechanics of these Techno Gears sets include gears and will introduce and allow them to experience the science of gear ratio. These products align with and support STEM (Science, Technology, Engineering, and Math) standards. Requires two “AA” batteries (not included) and three button cell batteries (included). Recommended for ages 6+ years.