where did the 4 wheeler pedal bikes go? I've only ever seen 3 wheelers, and in the 80's the atv 3 wheelers were soon declared dangerous. Are pedal 3 wheelers dangerous to little kids when cornering?

the 3 wheeler ATV was judged to be unsafe a couple years after hitting the market, and everyone switched to 4 wheelers... right? So did that change anyone's notion about buying their kids pedal 3 wheelers, because I don't think I've ever seen a 4 wheel pedal bike for little kids. Yes, this is off the wall, but here's a photo from the 30's or 40's with a kid on a 4 wheeler. It got me wondering

found on http://fifties50s.blogspot.com