In Nerdy Babies: Rocks, Follow Our Intrepid Babies To The Centre Of The Earth. Check Out The Variety Of Land Forms That Occur Around The World. Plus, Learn About The Layers Of Rock That Make Up The Ground We Walk On In This Simple Text Written In Question-And-Answer Format. With Bright Artwork And An Engaging Design, Nerdy Babies Is A Series That The Very Littlest Nerds Will Want To Return To Again And Again. Stay Curious. There's More To Learn About Everything!