Answer:
Tiny creatures that have a special relationship with flowers.
My first is twice in apple but not once in tart. My second is in liver but not in heart. My third is in giant and also in ghost. Whole I'm best when I am toast.
I move very slowly and carry my house on my back. What am I?
A blackbird similar to, but much bigger than a crow
The strangest creature you'll ever find: Two eyes in front and many many more behind.
I flow from the Homerβs mouth when he sees doughnuts.