Two specators are called to assist in this effect. First you show two wooden boxes. One is shaped like a heart andthe other is shaped like an oval. A ring or coin is borrowed and placed inside one of the boxes. Let's say the spectator places the ring in the heart shaped box. The box is then placed in a cloth bag and held by a spectator. The second box (oval shaped) is closed and placed in a separate cloth bag. After a magical gesture the assistant holding the heart shaped bag is asked to open his box. The ring is gone! The spectator holding the oval shaped boxopen his box and the ring is inside.
This is an amazing transpostion because the boxes are of different shapes.The ring clearly vanishes from one shape box and re-appears in the other shaped box.