K&rsquo;NEX &ndash; Revvin' Racecar 2-in-1 Building Set &ndash; 370 Pieces &ndash; Ages 7+ &ndash; Engineering Educational Toy 370 ASSORTED PIECES  The KNEX Revvin' Racecar 2-in-1 Building Set consists of 370 colorful parts and pieces made of durable plastic. These include rods, connectors, and wheels that can be attached to one another in different ways to build a customizable racecar or ATV. Packaging may vary. TWO-IN-ONE SET  This engineering education toy allows builders to explore and discover the joys of construction as they build two different working automotive models. Race to the finish as you construct a fast and furious racecar or transform it into a powerful ATV! MOTORIZED CONSTRUCTION TOY  Recommended for ages 7 and up, this building set features a battery-powered motor that gives life to the connected KNEX rods, wheels, and pieces. Expand your imagination as you build and customize motorized cars that cruise like the real thing. The motor requires two AA batteries. EASY TO USE  This building set comes with easy-to-follow, step-by-step instructions to guide children through their building adventures. Large illustrations aid in the construction of the two model vehicles. Unleash your kids creativity as they make their own designs for open-ended fun! STEAMagination: Its the connection of STEAM (science, technology, engineering, arts & math) with a childs natural curiosity and creativity and it powers the fun of each and every KNEX building set. Building with KNEX puts children on a path towards a fundamental understanding of STEAM/STEM subjects. DEVELOPMENTAL BENEFITS: KNEX supports key areas of a childs developmental growth. As they click the different parts together and discover how the building system works, theyre strengthening hand-eye coordination, fine motor skills, problem-solving skills, spatial awareness and exercising their imagination! COMMITMENT TO QUALITY: KNEX rods and connectors are responsibly made in America at a landfill-free, zero-waste green manufacturing facility in Hatfield, Pennsylvania. We test to the strictest quality and safety standards, ensuring that your child has a successful, trouble-free building experience. PARTS GUARANTEE: Broken part? Missing part? If you find yourself in need of a replacement for any reason, just give us a call! Well get you what you need so that your child can get back to building as soon as possible.