When my son was still quite young, our friend Ted Blades strongly encouraged us to get a copy of I am a Bunny, by Ole Risom and Richard Scarry. It turned out to be excellent advice, with the book being a longtime favourite in our son's room - and not just because the bunny, like him, is named Nicholas.
Over the last while, many of those early books have fallen to the side as Nick has stretched his wings - I'm reading the Narnia books to him at bedtime these days - but we recently took I am a Bunny down from the shelf, in part to find books that our son can read by himself.
It's a gem. It has just over 100 words, yet wonderfully covers hows the seasons change and the wonder that a child sees through it all. It also has the best Scarry illustrations I've seen.
It also, I might add, has an optimistic message (the last line is, "Then I curl up in my hollow tree and dream about spring") that certainly fits for the sluggish last weeks of winter.