very cool. my son is the same age and anytime we see a bike his head immediately turns, just as mine does.
on a somewhat related note about the radioflyer wagon, we too found it to be over-priced. we got this one instead - it's only $25, much lighter (so a little kid can easily maneuver it), and anytime he gets together with his friends they all want to play with it, instead of the r/flyer.
http://www.amazon.com/Step-2-773400-Walker-Blocks/dp/B000QF7HLE/ref=sr_1_5?ie=UTF8&s=toys-and-games&qid=1256343807&sr=1-5i'm gonna stop now. we're starting to sound like a soccer-mom forum instead of the bunch of bad-ass speed-freak motorcycle riders that we are.