The Xyloba "quaver component " adds the possibility of musical triplets or quavers, and is a great add-on to all sets. The quaver component is attached to the building tower like a balcony. The marble does not run from tower to to tower but rolls over the attached 'balcony' back to the same tower!
The additional note in the balcony allows for lively rhythms with quavers.  Mute tone plates (available in the Mixed Components add-on) can also be inserted as 'pauses'.

Contents:
2 quaver components, 2 mute tone plates

Visit Xyloba's home site in Switzerland for additional images and information.  Ages 3 and up.  CAUTION:  Marbles can represent a choking hazard to very young children.