GraviTrax Power Staircase

The Electronic Staircase automatically lifts several marbles at once to a height of up to 7 height stones. It does not require manual resetting for a new track. Thanks to battery operation, this accessory is continuously ready for the next track. Once a marble enters the first step of the electronic Staircase, it is automatically transported upwards. This creates new energy for additional marbles. In combination with the new GraviTrax Power Starter Sets, an endless cycle of fun with the GraviTrax marble track begins. How many marbles can the Staircase transport at the same time?