As a star rises higher and higher in the sky, Bear finds the perfect tree, gathers animals to decorate it, and summons people from around the world to join in a special celebration.

"In this interactive picture book, young readers poke, roll, and slide objects on the page, using their imagination to conduct simple physics experiments. They learn about forces (pushes and pulls), inertia, gravity, acceleration, and friction. Back matter includes a real-world experiment"--Provided by publisher.