Meccano - Engineering and Robotics - 25 in 1The Erector by Meccano Super Construction 25 in 1 Building Set features real tools and metal parts to deliver an authentic building experience that can help encourage your budding inventor to experiment, think critically, and cultivate engineering skills. It comes with several unique parts, including a robust 6 volt motor that brings creations to life with real, functional motion. Kids can use the 638 included pieces to construct the primary crane