The iPhone’s microphone plays a different role in the kid-friendly game Staraoke. This children’s version of karaoke teaches kids to carry a tune. A character on the screen collects stars by staying on the indicated path. But without guidance, they’re prone to wander off course. In order to keep them collecting stars and scoring points, youngsters choose a familiar tune (like Itsy Bitsy Spider) and sing along. When they’re hitting the right notes, their star scores soar. When they aren’t‚ well, practice makes perfect.