Flying saucer traveling through the sky in the middle of the day!

I may not be remembering the year or date correctly, but I remember what I saw very clearly. I was about 7 years old. My brother and I were walking downtown. We were on Warren Ave., one block west of Forest, on the north side of the street. We looked up and saw what appeared to be a something in the shape of what is now termed a "flying saucer". It was probably as high up as how high single-engine airplanes fly. We didn't believe what we were looking at so we stopped a male adult who was passing by and pointed it out to him. We asked him what it was. He looked up and was as amazed as we were. He said, "I think it's a UFO". As children, my brother and I had no idea what that meant. We kept repeating those letters until we returned home and asked our parents what those letters meant. (Of course, nobody believed us when we related what we had seen.)
Date is approximate, time of sighting is unknown.  PD