Hmmm 3.5 stars? It went over pretty well with my pre-kinderpgarten/kindergarten class, but it just really lacks engaging details to carry it through, and the contents of the box at the end are frankly a letdown. Way too cyclical. If it contained something more interesting, and clues to the contents were dispersed throughout, this would be a way more engaging read. Fortunately, I had a fun activity for the end of it, which made it feel like a not entirely pointless story time exercise. Even so, jeesh, I read this with the 1st graders hoping to do the same activity afterwards and they were pretty much bored to tears and wanted nothing to do with the post office afterwards. I did not blame them.