Evolution verses creation

Well, I could give some sort of update about our lives, or I could just jump in with some topic of conversation that is on my mind. I think I will go with the latter.

I am still teaching 4th grade at a Christian School. Being a christian school, we, of course, do not teach evolution, but rather creation. Recently we had a speaker come and talk about support for the creation argument. I agreed with much of what he said (6 days in creation, God created them in a specific order, with specific purpose, etc.) But enough of what I agreed with and on to what I don't agree with in his speech. :) He told the kids that if someone says to them "the earth was created millions and millions of years ago and we have been evolving since, they should have a response like what follows:

Guy: "...millions and millions of years ago"

Kid (warned to do so respectfully): "were you there?"

Guy "u..ummm...well, no.

Kid: "Well, I know someone who was, and I have a book he wrote."

This conversation is supposed to be an opener for the sharing of the gospel. Apparently a child had this conversation with someone and was applauded for it-seen as couragous. Now my first response is any little kid who says to me "were you there?" I am going to say: "please be respectful with your questions..." and I BELIVE in creation. So this is where the questions is: Am I just being silly with thinking that no matter how respectfully you intend to say this comment, it is still going to be disrespectful or not?