Craft & Crumb make baking kits that double as a craft afternoon, from a small company in Hampton in south west London. Each box holds the dry mix, the icing, the sweets and the paper props, so a child aged three to twelve can bake, decorate and dress the result with an adult nearby. The gingerbread house is the big project for the week before Christmas; the snowman biscuits are the quick one for a wet afternoon in the holidays.