Here are two perfectly charming board books—When I’m Big and Colors Everywhere (978-0-7636-3545-9)—from the author and illustrator of Guess How Much I Love You, a bestseller that inspired a host of wannabes. These will no doubt fly off the shelves like their predecessor. In When I’m Big, Little Nutbrown Hare and Big Nutbrown Hare are out on a spring day. A sprouting acorn will grow into “a mighty tree,” says Big Nutbrown Hare. Little sees a tadpole and is assured it will grow into a frog, and a caterpillar into a butterfly, and an egg into, well, not a big bird, but a grown-up one. In Colors Everywhere, on a summer’s day, Little and Big note all the many blues, greens, reds and yellows in the world, and they choose their favorites among them, culminating in their favorite brown, which is, of course, nutbrown. The sweet, sunny watercolor-and-ink images are both simple and pretty, as is the warm relationship between Big and Little. (Picture books. 3-6)