Big Cats is a ridiculously simple book. My toddler loves it, though. He's two and his biggest hero is Baby Jaguar from Go, Diego, Go! I made this book to teach him about jaguars and other big cats. I explain that each big cat has a common English name and a "secret" scientific name. He loves repeating the "secret" name after me and it's so cute.
I often add additional commentary about who has stripes or spots or manes as I read it with him. If we have time, I add more; if it's late and he's already had another bedtime story, I make it short. That's one nice thing about picture books, you can adjust the reading time easily!
I can't offer it free right now, unfortunately, so I'll post the whole thing free here. This is the whole book (sixteen pictures).