Let me start by saying: these bikes are for young kids and they are really expensive. But, there’s a reason I am writing about them: they are absurdly good.
I think my daughter was 3 or 4 when we got her a bike. It was a Hello Kitty bike we snagged from Target, a while later we got my youngest a bike at 3, a Minnie Mouse bike from Target. These run somewhere around $100. They are heavy and basically like the bikes I had growing up. In other words, they are what I think of, when I think of “kids bike”.