I got a Lotus Challenger frame from one forum member, and some fenders from another, and built up a bike for my daughter, who is small for her age but a great athlete. The bike is made for 27" wheels but I put 26" (559) wheels on it with dynamo-drum brake front hub and five speed IGH drum brake rear. Good wide gear range, easy to shift, good lights always on. Perfect for a kid. Now I just have to teach her something about how to take care of a fine machine.
My son has gone through a series of similar bikes, and I'm about to build him yet another one....