Eggs are awesome!

But how come some birds' eggs are HUGE while others' are tiny? How do chicks come out of them? Imagine if humans were born from eggs! WOW!

This book features in the following series: Zig Zag, Zigzag .

There are 32 pages in this book. This book was published 2010 by National Geographic Kids .

Becky Baines is a senior editor and writer for National Geographic Kids books.