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The Big Draw, the world's biggest drawing festival, are teaming up with Central Saint Martin's art college and House of Illustration for a day of demonstrations and hands on creativity. Professor of Drawing Stephen Farthing has rounded up thirty postgraduate students who will produce an epic drawing of the world in a performance directed via mobile phones and a drone (1pm-4pm). All day visitors can get involved by designing emojis, exploring henna design and completing a free walk-and-draw map of the area. They can even create their own map with illustrator David Lemm. There are also a series of timed events throughout the day including an interactive dinner-decorating sessions at the Ready Steady Colour tent (11.30apm, 12.20pm, 1.30pm, 2.30pm and 2.30pm, ages 2+. Book online) and an opportunity to meet and draw actress Ulla and her cat Binnacle from OperaUpClose's new family production Ulla's Odyssey (1.30pm-2.30pm).