Get Your Turn - Kid Timer on the App Store. See screenshots and ratings, and read customer reviews.
Piano Puppy @ Enabling Devices - Bilingual! We’ve adapted Piano Puppy, placed it in a sturdy mold, and angled it for easy access. With 12 different children’s songs and three modes of play, your child will have hours of fun.
I love this app! It has a series of activities for teaching children to use scanning. It starts with simple cause-effect activities and continues to grow skills for 2 switch scanning. There is a free lite version.