Challenge the boundaries of your imagination and have fun discovering the world of real engineering with the Erector by Meccano 2-in-1 Excavator and Bulldozer Model Building Kit! Your first mission is to construct a model excavator. With its custom treads, working boom with bucket and cab that rotates 360 degrees, this excavator is equipped to handle the most challenging construction sites! Once you're done, you can play with your finished excavator, or take it apart and rebuild as a bulldozer with custom treads and real working front scoop! This 2-in-1 working Excavator set includes step-by-step instructions, 254 parts, plus a real wrench and hex tool set. The pieces are made of durable metal and plastic so you can rebuild again and again. Now that Erector and Meccano are building together, young thinkers all over the world can start inventing with their first Erector by Meccano S.T.E.A.M. set. Your imagination just got real with Erector by Meccano! Ages 8 and up.