Inside Scouts Viv and Sanjay use their ability to shrink themselves to find and fix Ruslan the lion's leaky heart valve.

"Ever since mysterious bones were found in 1822, scientists and artists have tried to figure out what the creature they came from looked like. But it seems that every time they've made up their minds, someone makes a new discovery, and they have to start all over. That's only fair, though--after all, it's how knowledge advances!"-- Publisher's website

"It takes our many body systems working together to keep us alive and living our lives to the fullest. This set of True Books offers an in-depth look at our amazing bodies-one system at a time"-- "Discover the main systems of our amazing human body with this new series of books!The human brain is a natural wonder - the command center that, through a network of nerves, runs every other system in our bodies. Did you know that there are 100,000,000,000...

"It takes our many body systems working together to keep us alive and living our lives to the fullest. This set of True Books offers an in-depth look at our amazing bodies-one system at a time"-- "Discover the main systems of our amazing human body with this new series of books!Our muscular system covers our bodies from head to toe. It helps keep us upright and gives us the power to stand, sit, run, smile, and more. Did you know that your musclesmake...

"Are you ready for round two of the hilarious guessing game picture book? Discover fascinating facts about animals while guessing if you're looking at a butt or a face! Butt or Face? Volume 2 continues the delightfully cheeky challenge with a whole new set of animals from all over the world. Examine a close-up photo of an animal and then guess whether you're looking at the top or the...um...bottom. The answer is revealed on the next page with a compete...