This looks worthy: Annaka Harris has a kickstarter project for a children’s book, I Wonder.
I Wonder is about a little girl named Eva who takes a walk with her mother and encounters a range of mysteries – from gravity, to life cycles, to the vastness of the universe. She learns to talk about how it feels to not know something, and she learns that it’s okay to say “I don’t know.” Eva discovers that she has much to learn about the world and that there are many things even adults don’t know – mysteries for everyone in the world to wonder about together!
This is the kind of thing we need more of — get them young, and get them thinking.