"Otona no Kagaku Magazine 20 (Hand-Cranked Bird Organ)" Otona no Kagaku Magazine Editorial Department The appendix for issue 20 is the "Hand-Cranked Bird Organ." A bird organ is a small organ created in 18th-century France to teach canaries to sing. The appendix is an original design bird organ that allows you to program your favorite songs by punching holes in a punch card. Currently discontinued and difficult to obtain, making it a rare item. Unopened and unused, it has been stored for a long time. This item requires assembly by the buyer, and therefore, no operational guarantee is provided. #OtonaNoKagakuMagazineEditorialDepartment #Books #Nature/General 29:21:5.5