You want your child learning about the natural world the old-fashioned way, by going outside and looking, with beautiful books that make them want to. This is a classroom shelf of living books for nature study: seasons, seeds, birds, tide pools, and the tools to record what you see. Pick by the season you're in and the thing that's caught your child's eye this week, and read each at whatever level fits.
Every book here earns its place the same way: it makes a child want to go look at the real thing. That's the whole tradition of living books, learning from a warm, well-told book rather than a textbook, then taking it outside. Pick by season and by what's caught your child's attention: reach for the seasonal poems in any month, the seed book when you're planting, the bird story and field guide when the feeder's busy, Pagoo before a trip to the shore. Keeping a Nature Journal gives them somewhere to put what they see, and the Comstock handbook sits on the shelf for you, the grown-up, to look things up in. Read each at its own level; some are for laps, one is for you.