Try disconnecting the battery for about 30 minutes. If that does not work try to reset the key.

 Check out this link https://www.autocodes.com/p1610_nissan.html.

 Did it work? 

 Really? Well are there any pending codes in the car?

 make sure battery is fully charged before trying the procedure posted, a low battery is what caused the system to get locked in the first place. try re-programming the key again then followed posted unlocking procedure. the 708 should do it, procedures are all over the forum just do a search. if there is any other trouble codes besides system locked, post it here. if none of that works we need to talk to your kid I may have a job for him/her locking up vehicles.