I have two grandchildren living in Jacksonville who are looking to replace stolen bikes.  They are young, not accomplished riders, living in an area where bikes are a favorite theft item (kind of like here I guess).  I am looking at possibly finding them two better than Walmart quality bikes at very reasonable prices.  They are a 7 year old boy (he has never ridden a two wheeler) and a 9 year old girl.  I will have their exact heights soon.  Does anyone possibly have anything that might be appropriate in this case?

Thanks in advance... Bob