Balancing Card By Optical Deceptions (From theory11)
DEMO detail: https://store.theory11.com/products/optical-deceptions
A single playing card is shown perfectly, impossibly balanced - on top of the card box. As an extra twist, the card is then placed on the table - where it stands up vertically, on an edge less than 1 millimeter thick. This illusion requires no strings or magnets. Learn it now and build it yourself in less than 30 minutes.