Includes a Friction Motor system   Lights and various sound effects Front head can turn independently from the trailer Tail can be lowered to create a ramp to simulate loading the vehicles Detachable trailer Inertia friction powered driving motor Non-slip rubber tyres Dump Truck:   Lights and various sound effects Trailer can be raised manually to simulate tipping offload Free-wheel   Excavator: Arm and bucket can be manually controlled Free-wheel