Today I introduced a simple free app called Relax Melodies. (There is a paid version that has more bells and whistles but this free version is perfect for the children.)
This wonderful app allows the user to combine numerous relaxing sounds ( birds + rain), set a timer, listen and well relax or fall sleep. The children were immediately captivated and were listening, exploring and relaxing. Many said I am going to get this for my iPad! It is also available for the iPhone.
I use it myself! It is a wonderful app for adding a gentle loop to listen to as you fall sleep, block out outside noises and anchor your attention to relax, calm and even yes focus!