Thanks for raising this issue and to those providing feedback and the link as I also had the same question which is answered after seeing this thread. And, I shouldn't worry taking with me my kids for the interview. All the best to everyone!Thanks for the link to the other thread, it was helpful.
The letter references young children that need to be watched over and states that rescheduling needs to be done if childcare cannot be arranged. My son is 16, so I wasn't sure. Thanks, though.