Book excerpt: From writer Idan Ben-Barak and illustrator Julian Frost, the creators of Do Not Lick This Book, comes a hilarious, interactive picture book that takes a look inside our bodies to show what humans are made of. Lay your hand flat out in front of you. Have you ever wondered what it's made of? What's beneath your skin? Your muscle? Your nerves? Find out in There's a Skeleton Inside You! Follow two friendly aliens named Quort and Oort as their spaceship breaks down on the way to their friend Kevin's birthday party. They realize they need a hand, but . . . they don't have hands! Don't worry. They have a great idea: They'll just grow some! What follows is an uproarious exploration of what makes up the human body, layer by layer.