BRAND NEW IN BOX!!! SEALED!!! Meccano Multi Models Super Construction Erector Set 25 Models 640+ pieces ages 8-88 The 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.