Just chillin': Let the kids loose on Bill Granger's favourite, no-oven-needed cakes My middle daughter, Inès, is the most into food out of our three girls right now. She's writing a cookbook for a school project and has got very into fridge cakes - cakes that need no baking, but which set after some time in the cold. Shamelessly sweet and moreish, they're a bit of a departure from my usual thing. But, if you're going to keep the kids entertained over the school holidays - and, trust me, they are going to eat their body weight in confectionery anyway - you might as well make sure their sugar fix is home-made. Sour-cherry rocky road Makes 20 squares Blueberry swirl cheesecake Serves 6 Tropical fruit- and-nut squares Makes 20 rough pieces Food preparation: Rosie Reynolds,