For food that's fun to look at.
rainbow flatbread pizza
Rainbow Fruit Skewers! Fun, Simple, Easy & Healthy. A great Project for Kids. No Cooking Involved & A Great Option for a Holiday or Party Fruit Platter: The idea of a “Rainbow Fruit Kabob” is simply to select fruit that matches the colors of the rainbow! Then slide the pieces onto skewers. Try to be consistent with placement so when you fan them out on a platter you get the "Rainbow Effect".
Bake an Apple Pie in an Apple for Individual Servings
I love this idea, but made with natural colouring...
Cabbage Rose Outpost: Raggedy Ann Cakes