Meccano, 2-in-1 Model Set, Excavator and Bulldozer Challenge the boundaries of your imagination and have fun discovering the world of real engineering with the Meccano Excavator 2 in 1 Model set! The Excavator really moves with its custom treads, working boom with bucket and cab that rotates 360. Rebuild the Excavator as a Bulldozer with custom treads and real working front scoop! The fully built Excavator measures 4.25" long X 3.75" wide X 3.75" tall. For ages 10 and up. No batteries required. Includes: 254 Parts, 2 Real Tools, 1 Instruction Sheet