Power up your marble machine! The Marble city Motor Kit comes with everything you need to automate your full-size Marble city Dragon Coaster or Skate Park.It's a great way to enhance your Marble city showpiece! If you link multiple marble machines, you will need one motor per machine.The Marble city Motor Kit also comes with a fun comic that teaches you about some of the science that powers your motor.gear trains and torque! The Marble city Motor Kit is compatible with all Marble city kits EXCEPT the Mini Skate Park and Mini Coaster.To instal, you will need household white glue, screwdriver and pliers.Requires 2 AA batteries, not included.