Originally Posted by
oboeguy
So many good, thoughtful responses so far, thanks everyone! The idea of a trail-a-bike is tempting but I really think the little man is too young. We're just now teaching him to ride with pedals (having long-ago mastered, and now nearly outgrown his balance bike). I'd be extremely hesitant to take him on NYC streets until he was older and more in control. He's at a weird age and size combination where a rear seat seems ungainly, a front seat is impossible, and he's not mature enough for a trail-a-bike.
You mentioned in an earlier post that your son is over 40 lbs and "big for his age." My son will be 4 in August, weighs just over 30 lbs, and fits just fine on his TAB. Again, it's the "Compact" model, which makes a big difference. With the backrest attached I feel very secure having him back there. The backrest clamps to the seatpost, raising it about an inch, so I added a set of blocks so his feet can reach the pedals.