Some people prefer to get a cake professionally made, some people bring their own or some buy one from a supermarket.  Whichever you choose, I don’t recommend chocolate cake as it can look a bit like poo in the finished images.  Buttercream or fresh cream icing is ideal for the maximum squish factor – royal icing can be a bit tough for little fingers to get into.  Any kind of decorations are great from personalised cake toppers, tons of colourful sprinkles or fresh fruit – whatever suits your style.