The trip became the basis of Red Balloon 86, an exhibition that opens on Thursday at the Museum of Childhood in Bethnal Green and runs until November. Five large-scale images of the vacancy of Pripyat have been ingeniously photoshopped to include the figure of a solitary little boy (the son of a friend of Hana’s) holding Lamorisse’s red balloon. Alongside these is a video in which boy and balloon seem to move in ghostly fashion from one Pripyat landscape to another. The effect is bewitchingly beautiful, and as mysterious as a dream.