I'm trying to find a recreational bike for my girlfriend. The main problem is that she's short 4'11" and has short arms and legs. I bought a 12" frame 26" wheel mountain bike at a garage sale thinking that it would work. It didn't. I've been trying to get her in to a bike shop to be fitted but she's embarrassed to do it. I've suggested that a 24" kids bike might be more comfortable for her. Any suggestions?