The LEGO TECHNIC Excavator is loaded with realistic details & working functions including mechanical actuators that raise & lower the articulated arm an extending & contracting bucket scoop 360-degree rotating cab section & rolling caterpillar tracks Download building instructions to rebuild into a Tracked Dumper Turn the gear to raise & lower the boom then flip the switch to move the bucket scoop Rotating cab turns in all directions Features turning caterpillar treads Excavator measures 71 2 19cm long & 12 30cm high Add motorized power with 8293 Power Functions Motor Set