You know those bikes could go over big with kids learning how to balance on a bike. Just trying to explain to my grand kids how to stop depending on the wheels and use your feet if you happen to fall one way or the other is a challenge. I remember when I was a kid you grabbed up any bike someone was willing to offer up to you whether it was three times larger then yourself and you learned real quick how to use those feet to keep from hitting the pavement. Of course kids have all the energy in the world and love a challenge so getting a running start then coasting they'd be all about that.