If the idea of diving into the Ikea ball pit has always appealed, you may be surprised to learn you are not alone. BallieBallerson, set over two floors at a venue in Dalston, gives adults the opportunity to be young again by leaping about in a pit filled with more than 200,000 plastic balls. There are also blow-up and foam toys to play with. Organiser Wenny Armstrong, 30, from Hackney, said: “I think I came up with the idea when I had had too much coffee and just thought it would capture the imagination of a lot of people. The response has been huge.”