Percy the Penguin is the latest must have sleep aid from The Gro Company. Percy the Penguin plays four soothing sounds including heartbeat, rainfall, white noise static and beautiful Brahms lullaby. Promising to always be there, the CrySensor technology means that Percy automatically activates when baby cries, so that he can soothe little ones back to sleep in an instant, without you having to get up. The sounds play for 20 minutes and then Percy switches to standby mode for three hours. He also makes a cute addition to the nursery and is easy to take with you on-the-go.