My children both got braces today? Help!!?

They are both complaining of soreness. I knew this would be a case as I was told that at the office. I have been giving them pain reliever every 4 hours as told by the office. I was not shown nor told how to help them with the braces, only given a sheet to explain it to me. My son is 14, daughter 11. Both know how to use the floss and start and I have been and will continue to make them brush their teeth after each time of eating. However, I need to know if they are supposed to floss between each wire and bracket every day or just (as my son said) where something was? The papers only say to floss once a day but don't specify. Sorry if this is a dumb question but it has been a very stressful day and we are all exhausted. Please help if you can...