My just released eBook called "Single Stone" is part of Series of publications using "found" objects as "Found & F.U.N."
for true Impromptu Effects. In a restaurant this can mean coffee creamers, jelly packets and salt/pepper packets.
At a party or office; candy, nuts, pebbles, etc.

This first eBook has 15 effects using just one object and possibly an available cup or spectator's hand.
Future releases will feature "Pair of Stones" (two objects), "Fistfull of Stones" (3-4 objects) "Pile of Stones" etc.,
plus special one for borrowed objects like finer rings and coins.

the key is that the special Methods and Techniques means you can perform 'anywhere, any time' with nothing to carry.

I have performed many of these Effects for 60+ years, with other Effects or Performance Modules adapted or combined.
The F.U.N. part is Foresight, Utility and Nurturing comments to add "why" and "when" to the "how" explanations and suggested scripts

Moderate hand skill is required plus live audience engagement experience.

Another feature is a Prelude Approach in which these "spontaneous" Effects can test the crowd's appreciation/attention before launching your favorite stuff.

I am keeping the prices ridiculously low to encourage more life interactive performance and strong magic over 'gotcha' stuff.
I can't perform much anymore because of various disabilities. Time to pass these innovations along.