PythagoraSwitch DVD Pythagora Device DVD Book Volume 1-3 Set The regular price is 2800 yen plus tax per book, so it would cost nearly 10,000 yen for all three books, so this is a great deal! Children are captivated when PythagoraSwitch plays. Recommended for babysitting your grandchildren. My child bought these for themselves, and I received a new set as a gift, so I'm selling these. Volume 1 was opened and played only once. Volumes 2 and 3 are unopened. They still have the plastic wrap on them. There are no noticeable scratches or stains. They have been stored in a dark place. Please consider purchasing only if you understand that these are used items.