On a walk, two brown-skinned siblings ask thoughtful, clever questions about the natural world. “Are trees the sky’s legs?” “Is dirt the world’s skin?” “Are shells the shore’s necklace?” “Is the ocean the world’s bath?” Each double-page spread features a single question related to the specifics of what they see as they move through a variety of natural settings near their home, their exchange feeling both serious and playful. The two children are always easy to spot in the colorful, lush multimedia collage illustrations on matte pages, while the spare text is rich with imagination and possibility. (Ages 3-7)