http://www.playwithsand.com/product_info.php?products_id=6162
The Divining Rod—a routine in which the participant's thoughts and questions cause the gemstones to change color, not once, but twice. Highly personal and evocative, this routine is visual mentalism and will be remembered and felt by your audience long after your performance.
you watch carefully then you will understand
playwithsand 1 year ago