Any recommendations for short story collections? My 6 and 9 year old boys don't have long attention spans on the nights that they need to be together for a bedtime story (more interested in arguing!). They've liked the David Walliams Worst Children books. Any others that are fun/rude etc and likely to hold their attention (i.e not Enid Blyton!) while providing a good 15 minute or so reading session? Thanks