There's two kinds of fake food: the replica fake food like the food displays in the windows of Japanese restaurants, and the cute kind. My collection of fake food is the cute kind.
And my ultimate favorite kind of fake food is much harder to define, but I like to call it functional fake food. fff is adorable and should have a high design quality. It's cute but usable, playable. You can cuddle with it, use it in the kitchen, or maybe it's a funky display item. It's realistic but does not try to be exact. There's always lots of whimsy. Hand-crafted is good and natural materials are best.
On the other hand, here is plastic fake food that is super cute. The difference is that these donuts are not trying to look realistic so the plastic doesn't detract from its playfulness. Children's toys are a great source of fake food. These donuts came as a half dozen from Lakeshore Learning many years ago. The frosting comes off and can be mix n' matched with the bottoms.
Wood food is best, and Haba is the best of the best! These butter cookies evoke the real thing but leave lots of room for imaginative play.