You don't have kids.Unless it's much smaller than the picture portrays it to be, that bike is way too big for a 4 year old to ride. I just noticed that there is a 18 on the seat post tube, is that an 18" bike? If so then it looks a lot bigger in the picture than it really is.
With kids that age, you should know that there's a whole assortment of bikes with 20" wheels and under. You've gotten your boys bikes, haven't you?I have two boys actually, 6 and 3. That is why when I noticed that it was a 18" bike I changed my response to it looked bigger in the picture than it really was.