This is a page from Lifecycles, a short pamphlet by Manvir Singh. The mini-book collects illustrated accounts of reproductive cycles—how various flora and fauna create replacements for themselves and how those replacements grow into adults.
It's a great, short read that would be perfect for a grade-school aged kid to explore. (There is a page for humans, but it skips over all the NSFW parts.)
Singh is part of CreatureCast, a collaborative, multi-media blog produced by students in Casey Dunn’s Invertebrate Zoology course at Brown University. So, not only is this an awesome educational resource, but it's an awesome educational resource created by a student. (And did I mention that it's CC licensed and free to download?)
Maggie Koerth-Baker is the science editor at BoingBoing.net. She writes a monthly column for The New York Times Magazine and is the author of Before the Lights Go Out, a book about electricity, infrastructure, and the future of energy. You can find Maggie on Twitter and Facebook.