Hi Aimee!
Ah, I remember those days! lol (my first son is almost 18 now).
I am all for age-appropriate, matter of fact responses.When a three year old asks where baby comes from, it's "Mommy's tummy". When a TEN year old asks, it's something a lot different.
I always tell other Moms to try not to be nervous or come off as sex being a "big secret" when you come to answer questions (which I believe should be answered when asked).
I'll tell you why (true story):
Me (age 7): "MOM...I thought you said people could only have babies if they were married. Izzy's daughter had a baby and SHE's not married. How did that happen?"
Mom: "Let's talk about something else. How is school?"
Me: "But Mommmmm. I want to KNOW!"
Mom: "Well, all I can say is that that girl needs to get right with God. Is your room clean?"
Me (age 9)"Mom, what is masturbation"?
Mom: (horrified)"Stop reading Judy Blume books! It's when a man touches himself DOWN SOUTH and it is a dirty sin!"
Me (confused): "Why does he do it then?"
Mom: "Stop asking silly questions. Go clean your room."
Me: (age 12)"Mom why is it that girls get their period?"
Mom: "STOP READING JUDY BLUME!"
Me: "Does it have something to do with sex?"
Mom: (gasp) "Where did you here THAT? If you get your period, the pads are under the sink, If you get cramps, blame Eve. It's in the bible. I'm going to go check on your room."
Me: (age 16)"Mom, I'm pregnant. This is Christian, the baby's father."
Mom: (stunned silence)
Me: "Don't worry, we are going to get married".
Mom: (jaw dropping)
Me: "Guess I'll have to go back to high school. I have some things to figure out...
...I'll be in my room."
So, there you have it. I know your question was about a tampon, and I am NOT insinuating that you are, or were planning to be, like my Mom in this situation. I just wanted to illustrate (albeit dramatically) what happens when such subjects are a mystery to kids. They get more intriuged when they don't have the information, and a lot of times will go try to seek it out for themselves. In my situation I wanted to see what the big deal about sex was. My son was the result. Now, I would never change a THING, and my son was the best thing that had ever happened to me, but hopefully the point hits home: If kids aren't given the information, they will go get it themselves.
:)