Boomwhackers (ブームワッカー) Diatonic This instrument was born in America. The pipes are tuned and can produce the exact Do-Re-Mi scale. They are played like handbells by hitting them on hands, knees, floors, desks, etc. They are used in kindergartens, nurseries, special needs schools, and also in eurhythmics classes. Although new and unused, this item has been stored at home for a long time, so please understand this before purchasing.