For the KoD – Poppet is indeed a term of endearment as I told you. When I call the little one Poppet I am not calling him a PUPPET. From the Cambridge online dictionary.
Poppet – noun
Definition: a person, especially a child, that you like or love
[as form of address] Come on, poppet, it’s time for bed.
Oh, Becky’s a real poppet – such a sweet girl.
(Definition of poppet noun from the Cambridge Advanced Learner’s Dictionary)