Arcana 3-KeysThe 3 Keys set is an alternative version of the standard Arcana keyboard (that has a set of 5 keys). People with cognitive and physical difficulties can use the 3 keys set instead of the 5 keys set. This simplifies the learning and playing experience significantly. Changing from 5 keys to 3 keys is very simple the keys are attached to the instrument by magnets, so changing them is quick and easy. Playing in 3 keys limits the note range and makes