I have built a bike for a 10 year old triathlete, a mountian bike for a 2 1/2 year old toddler but this is positively the smallest bike I have ever built. The frame is a replica of one of those wooden "Like a bike" push bikes that are currently so popular. If you look at the frame you can see that I started with a tange cro-mo road fork and built it up from there.....the front fork is one that I built a little too short so I chopped it, spread it and welded on some old plate dropouts that I had sitting in a box of leftover Bontrager pieces. The seat tube is from a BMX tubeset , the rest are various cro-mo straight guage aircraft tubes except the headtube which is another relic from the Bontrager junk box. The tube that hangs downward derectly behind the fork is a steering restrictor, something requested by the customer......even one year olds can be very specific.The whole thing looks like a leaping jaguar, or more appropriately , some sort of creature from a movie done with too much computer animation. It was fun and challenging to build.