手紙を開くと動く機械が出てくるMechaniCards™ （動画）
郵便を開いて、クランクを挿し込むと・・・・・
素敵な贈り物ですね。
MechaniCardsは現在５種類、$45から$70というお値段で５個セットが$300ドルということです。
自分に送りたい！ｗ
MechaniCards™ are miniature, hand-operated, kinetic sculptures, designed and produced in limited edition by Bradley N. Litwin. Each one is hand made, numbered and signed by the artist. They are constructed primarily from paperboard, with a few bits of wood, metal, or plastic. They make excellent gifts, and are suitable for mailing, as truly unique greeting cards. Each piece comes with complete instructions and display recommendations. They are also available as do-it-yourself construction kits.
