We have no neighbor kids. This is why preschool was so important to us. Otherwise her best friends are:
Rocky - the pure white rock.
Spoony - plastic spoon.
Snaily - an empty green snail shell.
Pumpkiny - you get the idea...
Woe be it to you if you don't know where they are. Actually, she doesn't get too attached to any of them, but when she runs across them again later she definitely remembers their names ;)