I am writing an iPad app for children that involves interaction with a song, starting with "Old McDonald." The developer needs to be comfortable with Android devices as well. Songs will continually be added so this is a relatively long-term project. Upon buying the app (one song), the parent will have a choice to use the song in leisure, learning, or therapy mode. I am starting with leisure mode and will release it by itself first to see what the response is. I'd like to do this soon and have detailed drawings and directions created.