In this interactive e-book, Chase the helicopter starts sleep flying while taking a nap. Zack and Lily try to wake him, but not before he crashes into a tree and gets stuck at the top. Zack, Lily and Strut the crane try to free their sleepy friend from the tree.

Share the experience with your child by choosing the Read to Me option, and listen as the story is narrated by Zack. Each word is highlighted as it is read, and small animations play as the story progresses. Your child will love to re-play the animations by activating them through touch.

Or read the book to your child by selecting the Read by Myself option and watch as your child enjoys exploring the animations and sayings that can be activated on each page.

In both options your child will love discovering the interactivity that is triggered by their little fingers.

Based on Zerby Derby, a fully live-action series that airs on Sprout. In the series, toy-sized, remote-controlled cars live and play in a life-size forest. Whether it's crossing streams, building dams or exploring a meadow, the Zerbies approach every problem with enthusiasm, and when things go wrong, they happily tackle each set-back with their mantra: "try, try again."