I have a similar situation in question3 途徑一: 
your child may renew his/her B-2 status again and again. 
how easily can the child's B-2 status be renewed 
-Depends on the child age. If the child is very young, e.g. baby or under 14, it should be easy to renew the child B-2 status again and again.
and how many times can the child's B-2 status be renewed? is there any limted time?
-No limit.
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                    Thanks so much, Teacher 8.
                     -nirvana_wander- 
                    ♂                    
                        
                    
                                                            
                    
                    
                                        
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                        01/07/2015 postreply
                                                10:28:27