These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Tear Jerker / Nightmare Fuel: The conflict of the book: the boy gets Scarlet fever. Try being a small child (unaware of the concept of anti-biotics or the fact that the disease is now rare and treatable, etc.) hearing or reading the story and finding out that a character around your age has a disease, it is possibly fatal and afterwards his toys are burned.
Yes, the rabbit becomes real and is saved, yay! All the boy's other toys that could talk to one another, now...