Introduces 8 new mechanical Robots with engineering challenges to perform. Includes all the pieces to build the new models (including a bulldozer scissor lift plow hammer and more) as well as six new map cards. Manufacturered by Thames & Kosmos. Cannot be used without the original kids first coding & robotics kit; robotic base unit and code cards from the base kit are required to operate the new models introduced in challenge pack 1. For children ages 4-8 includes a 20-page storybook-style manual with step-by-step instructions and clear visual explanations. Add-on pack for the award-winning kids first coding & robotics STEM experiment kit!