Heat Pad is a cause and effect app that is nice to use with visually impaired children and kids that just need a break and get away from an overstressed environment. A simple touch to the iPad's surface leaves a trailing mark on the screen. You can choose from 18 different settings, each having a different visual effect and/or color combination. The thing I like about this app, is that it puts the user in control and that in and of itself helps relax the nervous system. The music can also be turned off in the sound settings to decrease stimulation. There is a link to more apps in the settings section (designated by an i), but I never noticed it til doing this review! Recommended.