A vivid orb of light in a completely clear blue, mid-day 1960s Las Vegas sky moved irratically within a small radius above our house.

I'm unsure of the exact date and time of day, but when I was about 13 or 14 years old (1967 or 1968), living in Las Vegas on Hobart Ave. in the Charleston Heights section of town, I was outside on our street playing with my siblings and friends around mid-day.  I looked up in the sky, which was completely free of any cloud cover whatsoever, and in the distant blue above our house there appeared a white light.  It was extremely visible in the vastness of the deep blue desert sky (before pollution invaded the valley) and from the distance I was watching, it looked about  the size stars look at night, only much closer, and it moved in an irratic pattern, but only within a very restricted area of space.  In other words, it rapidly moved up, down, left, right, etc., etc., but never left the radius of sky  just above our house, which amounted to about the radius that the full moon takes up in the night sky, only it seemed much closer than the moon.  I remember it was so very strange to see this in broad daylight, with there being no apparent reason for it being there, and nothing in the sky that could be causing a reflection of some sort.  I pointed it out my friends, and we stared at it for awhile, then I think we just got tired of guessing what it might be, and like all kids with short attention spans, went on with our playing.
Date is approximate.  PD