How old were your children before you let them go on a public bus into town?
Did this age differ if they were on their own or with a friend?
Did it involve you putting them on/meeting them off it (though obviously at the other end they'd not have you)?
What age did they go on a school bus without you putting them on/meeting them directly from it (not a bus trip from school with their class teacher, transport to/from the premises)?