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How many boys and girls know what I mean when I talk about reminders? Can anyone think of something which we might call a reminder? (Let the children give you some things which they think of as reminders.) That's pretty good. When I think of a reminder I can't help but think of a string that my mother used to tie around my finger so that I would not forget about the time that I was supposed to be home or the job that she wanted me to do. That was one kind of reminder but there are a lot of others. For instance whenever I leave the dentist's office there is a nice lady in a white uniform who gives me a little card with the time written on it for my next appointment. It says "Don't forget to come back and see us next Tuesday at 10:15 a.m." How about the reminder the fireman get…