When I Grow Up (Little Critter)By: Mercer Mayer Series: Look Look Mercer Mayers Little Critter is thinking about all of the fun things he can do when he grows up in this classic, funny, and heartwarming book. Whether hes spending his allowance on whatever he wants, making important phone calls, or staying up late, both parents and children alike will relate to this beloved story. A perfect way to celebrate growing up!