The Jastrow Illusion, which is often referred to as the Boomerang Illusion, is one of the rare optical illusions that looks amazing even though you may understand how it works. The basic effect is that by placing the two objects in a certain position the objects can be made to look longer or shorter than each other. There have been many applications in magic, and this is one of the best.

It is a self-contained routine with four brightly painted pieces of custom-crafted wood in an elegant burgundy sack. It is a complete performance piece packed with amazement and amusement. Laughs and gasps combine as pieces of wood appear to change size in ever more intriguing colorful combinations.

The theme of the routine can be tailored to one's audience: A demonstration of audience hypnosis, a look at poor quality control, the reason you failed geometry, the power of suggestion, what happened when you tried to assemble that thing from IKEA, and even the techniques behind Classical Architecture (as seen in the trailer).

Comes complete with all the necessary wooden props, a cloth bag to carry them in, and access to an online tutorial. Manufactured by David Regal Magic.