At what age did your kids get an Instagram a/c

DS has been asking for a while since he has an older sister.  i made her wait till 13 for FB since that is what the rules said.  by the time she was 13, she didn't even want it and has never had a FB account.  i did let her get instagram at 12 because i didn't know what it was and thought it was just an app with some cool filters.... i suggested she get it so we could use it for pics.     didn't do my parenting research there thought she was not allowed to post any pics of herself until grade 9 and could only be friends with people she actually knew.

fast forward to DS, starting grade 6 this year.... he has been begging for instagram or snapchat for about a year and ALLLLLL his friends have it (not true).  he just turned 11 end of august and i consulted with DD and she suggested snapchat was better for his age and more private so he got it.  he has 3 friends, one is DD and other is DD's boyfriend.  

i would say if she isn't asking....  no way i would be suggesting.  it will happen all on it's own.