Leap into Hop Frog, by Rick Chrustowski.
One spring day a frog's egg hatches in a quiet lake. The tiny tadpole that emerges is weak at first, but little by little he grows stronger. Soon he sprouts legs and swims to the lake's surface to breathe. A few weeks later he hops out of the lake onto dry land, a young frog at last. But land turns out to be a very different place from his watery home. Can the little frog survive?