Kids love to pretend. But maybe they're not as good at being animals as they could be, so San Francisco author and illustrator Lisa Brown ("Baby Mix Me a Drink") offers some tips in How to Be (HarperCollins; 32 pages; $15.99; ages 2-5). For a bear: "Catch a fish with your hands. Hibernate. Growl. Be brave." And so on for monkey, turtle, snake, spider and dog. Brown did research on her own 2-year old son before settling on what to show. Her lively ink drawings have two kids, presumably a brother and sister, doing funny demos right through to the small surprise ending set on how to be a person. The animals lay the groundwork and make it look so easy. This seemingly simple but thoughtfully presented concept book is full of robust playfulness but also makes a gentle point about just being yourself.