(Reviewed with Sparrow Takes Flight by Amber Hendricks) These pleasing entries in the Little Nature Explorers board book series pair rhyming texts offering rich vocabulary with cozy illustrations. In Sparrow Takes Flight, a fledgling sparrow prepares to fly for the first time. (“Quiver, quiver, quake. / Ruffled feathers shake.”) Home-building activities of four different animals (squirrel, bird, ant, and beaver) are featured in Nature’s Architects. (“Plan, plan, plot. / Pick the perfect spot.”)