The Snowy Day by Ezra Jack Keats
One that has already stood the test of time (decades now, so I think we can fairly definitively say that), I was debating whether it was even worth my time reviewing this one. But there are always new readers. (+ one must be consistent with reviewing, mustn't one? ;)) It's so well written... And though it was a groundbreaker upon publication, personally, I don't think it's stuck around just because it's on mandatory school reading lists. It's a day in the life of a young child, told simply and beautifully, and that immediately resonates. It's one I vividly remember from my own growing up; and I've since seen it genuinely loved and enjoyed by all different children alike -- boys and girls, the quiet ones and the loud and wiggly ones... Their attention is caught and they naturally identify with the little boy protagonist. So yes, altogether a classic and an absolute gem!