T-shirt arrived the day before the fair.
I wore it both Friday and Saturday.
I've been going to the fair for 23 years.
I have never had people start conversations, no matter how creative, thought provoking, or funny my past t-shirts have been.
On Friday, a surgeon asked me about it. He asked; "Which ones"? I was confused, but then realized that the t-shirt says; "Physics Forums". I explained the whole thing.
Some people took it as a challenge to see how smart I was. One guy asked me what Einstein won his nobel prize for. Unfortunately, I can never remember if it was Brownian Motion or the Photo-electric effect, and picked the wrong one. He of course knows that mere commoners all think it should be "Relativity". Then, coincidentally, as we were at energy park, standing next to the worlds most efficient refrigerator, I asked him if he knew that Einstein's name was on a patent for a refrigerator. He said he didn't.
At one point, a person of altered mental state ran up to me while I was waiting in line for a chicken sandwich, and, well, I'm not 100% sure of what was going on in his mind, but it appeared that he was trying to tell me that "The Fair" was the forum. He wouldn't shut up, so I just nodded politely.
Another person asked me what a quark was. Not knowing what a quark was, I told him that there are three of them in Neutrons and Protons. He left before I could tell him that they had 1/3 and 2/3 charges.
The soap sales lady said she liked all kinds of science. Which I acknowledged was my problem also. No focus.
A wheelchair bound pre-med microbiologist, who at first I assumed was a mentally handicapped quadriplegic, as his parents parked him right in front of me at the music stage and he didn't move for 15 minutes, was very interested in joining the forum, but couldn't get internet service where we were sitting.
There were about 10 other conversations.
Now if people think I'm an idiot for spending $21 for express shipping for a $20 t-shirt, think again. I spent $20 for a marble and $25 for a piece of clothing which I decided later that I will never be able to wear in public. Now that was stupid.
I'm pretty sure that the t-shirt made this one of my most enjoyable fairs ever, as there is nothing in the world like intelligent conversation.