Thumb pianos are also know as Kalimbas and sometimes referred to as Karimbas or Bmbiras. Different sounds are achieved by plucking down on the 7 metal keys. (Each Coconut Coco Kalimba is uniquely hand painted and vary extremely in color, style, size and shape). This item may become out of tune while in transit but there is a fix. Slightly loosen the 2 screws just enough to spread the keys apart or push them together as necessary and they can also be slightly pushed down or pulled up as needed and then tighten the screws. Be mindful not to over tighten either screw. Please note that these are more of a children's toy and not a professional musical instrument. Approximate size: 6.5" x 6.5" x 3" Approximate weight: .5 lbs.