I was fortunate to have sourced and purchased Amac's Educated Pencil from a private seller this week (not cheap!).

Made in the 1930's, this is an enduring gem and worth every penny

A real puzzler, completely self contained, everything totally examinable, without fear that anyone'll guess its devious method.

After shaking pencil in a capped metal tube, performer removes it and balances it upright on the table - spectators try to do the same, copying actions of performer, but, of course, never succeed.

It benefits greatly from repetitions.

Now pretty rare, but, if you're lucky enough to find a seller, I'd recommend that you'd consider buying it.

This has endured the years, it's power to confuse and entertain remain undiminished.

You won't be disappointed!