The pleasure of being fooled: inventor Mark Setteducati makes maths into magic

What goes into crafting a convincing illusion? For the US magician and inventor Mark Setteducati, whose toys and puzzles have earned him patents and accolades, personal expression and a mastery of maths have been key. In this profile from the US director David Friedman’s Inventor Portraits series, Setteducati discusses his creative process, and some of his most clever creations.