My son is 3 and a half now. He's a climber or a jockey it seems because there is nothing to him. Just 13kg and 93cm. He has been on a balance bike since last xmas and now with xmas approaching again, he is writing to santa for a pedal bike. Been looking around a bit and there seems to be feck all out there to suit the light weight that he is. Most bikes seem to weigh in at around 13kg or a there abouts. Don't know about you, but I can't imagine riding something almost 100% of my body weight. Imagine that falling on you as you learn to ride. BridgeStone have a 16"er that is 7.9kg which is not bad but he won't fit that for a while. Found a pretty awesome little bike in the US called the Woom 2 which is just under 6kg but they don't seem to ship here. Bit expensive also but I guess its the same formula as big boy bikes regarding weight. Need to look around a bit more. Also found a rather rad 14" BMX that apparently suits 3-7 year olds. http://www.deliriumdistribution.com/plug14 . Check that bad boy out. He's too short (by 2cm) still but wondering if I should go for something like that and put him on a stretch rack. I loved bikes I could jump around on when I was young and he gravitates towards curbs and bumps on his balance bike. Maybe not a good purchase for a first bike for the kid though?? I'm having trouble considering a heavier bike with training wheels though after all the freedom he has had on his balance bike although he is pretty good on the 12" bikes with trainer wheels in Komazawa park. I've another little gangster currently at 1 year old so anything we buy won't go to waste anyway and should see good use. Be kind of sad though if it turned out the kid couldn't ride his xmas present for another 2 months or so though wouldn't it. hmmm. I guess I want the BMX for me also. Gosh. Just wondering what other folks did living here in Japan and how that worked out?