This is a very interesting novelty to make up.  It can be constructed from key rings or you could make the rings yourself from welding rod or similar material.

You need about thirty rings of approx. one inch diameter or 25mm.

Link them in a chain as shown in the diagram above.  By holding ring A and dropping ring B and vice versa, the dropped ring will appear to run from the top of the chain to the bottom.

You can make this a continuous process.

This is a very pretty effect and could be sold as a money maker at county shows etc if you can find a bulk supplier for the rings.

It can be made more deceptive by having an extra loose ring concealed in your hand.  When a ring has travelled from the top to the bottom, you pretend to catch it with the hand holding the loose ring.

The Jacob's Ladder would also make a very interesting display for a shop window or for a magician's den.  If a motorised rocking mechanism was attached to rings A and B.

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