Think that the artist Alexander Calder just did brightly-coloured hanging mobiles? Think again. This cheeky little portrait of radical French writer Jean-Paul Sartre might surprise you, unusual for its distinctly cartoonish style and spare use of line and colour. Like a doodle that you might do on a napkin over lunch of a pal, it gives a brilliantly personal insight into Calder as friend and as well as artist. Catch it as part of Alexander Calder: Radical Inventor, currently on show at The Montreal Museum of Fine Arts. The exhibition brings together a vast range of the artist’s paintings, sculptures, jewellery and other graphic works.