PSA: if you are looking for a new kids bike for the summer...
I've been watching Ibex Bikes for some time hoping for a sale. They don't come too often but there is one going on now that is pretty decent. The site itself is pretty good but the discount is better if you go through their Facebook posting. Links are below for the 320 and 440. Through Facebook the 440 come out at about the same price as the 320's normal price.
These bikes get solid reviews and are what I settled on for our kids.