Three country kids see circuler craft in plain light of day at near stones throw, report it to authorietes.

I and my two sisters spotted this craft about a half mile away, within moments it came right up to where we were standing. I'd say it would have been a good whip but at 11 years old, I believe I could have hit it with a small rock, of course I didn't do any thing that foolish. My older sister was 13 and my younger sister was 9.
We observed this craft for at least a couple of minutes, I say it was about 21 ft in diameter and had a steady hum of near 60 Hz. There was no exhaust but heat waves seemed to disapate from metallic surface. There were several different colored lights around perimiter of craft. Also on upper deck there was a rectanguler window which appeared to have 12 yellow lenses or lights behind it, of course as craft would rotate this window would come around once per revolution. I must say it looked very simaliar to many popular craft filmed and photografted many years later in Switzerland.  All of a sudden it picked up it's 60 cycle hum to maybe 70 hz hum, and believe it or not disappeared right in front of our eyes.
This event was reported to the Outagamie County sherifs department. A deputy came to our house after my Father called him because there were alot of sightings in Wisconsin at that time, the deputy used alight form of interagation on each of us at a time in squad car and he then informed our parents that this event happened and these kids are not making this up.