children see flying saucer in small East Texas town

The day and the year of this sighting is a guess.  At the time of the sighting, I am guessing my age to be eight or nine years old.  
My nephew and I were outside in front of my home at dusk. We were lying in the grass beside the road.  We would jump up as a car drove by and attempt to scare the drivers.  We were children and weren't being watched closely!  While waiting for the next car, a "flying saucer" slipped from NNE to SSW at tree top level.  I can still see that saucer clearly in my mind after all these years.  It made no sound.  It made a Z movement as it slipped through the air. That Z movement impressed me, because in 1995 when I saw my second UFO, it made that same Z movement.
 My nephew was no younger than two but probably not yet four when we saw the saucer.  He remembers it. He had to be old enough to talk, because when we saw it, we turned to each other and yelled, "UFO"!  We also had to have heard "UFO" on the television or radio for us to know that term!  
We ran into the house, but neither of us remember what happened after that and there is no one left alive who could tell us.
 The only difference in our memory of this sighting is that he remembers windows in the saucer and I don't.
Witness indicates that the date of the event is approximate.  PD