
The trick is to stack them together and then they harmonize (well, in a manner of speaking).
My neighbor is a grown woman. My wife, upon seeing a video on YouTube of these in action, thought they'd be too babyish for our three-year-old granddaughter. But the box says for ages 6 and up. What do you make of that?
Mighty cute, but could be potentially annoying if the buttons were pushed frequently.