Just after dusk I saw an orange shere which moved at a fantastic speed, stopped and 'observed' me and dissappeared.

The month year and date are approximations. I was 4 years old and was walking back form our mail box  on a cloudless evening when an orange shere appeared over top of a pine tree which was about 100-125 feet away. The object had come from the western horizon and moved to it's position over the tree at an incredible speed. I would say that it took 1/2 second or less for this to occur. I immediately turned to my left (north) and gazed at the object. The sphere had no discernible features other than the color orange. In fact it it almost seemed to occupy only 2 dimensions like a projection of light against a flat surface. As I stared at the light I felt as though I was being observed. After perhaps 3-5 seconds the thought occured to me that the object was going to leave heading east. No sooner did I have this thought than the light sped off eastward (and out of my view as our house blocked my vision) at the same speed as coming out of the west.  Within 3 seconds I had another thought, that the object was going to reappear from the east. Again, as soon as I had this thought the orange sphere reappeared out of the east (as quickly as it had departed) and hovered over the tree again. Once again I felt I was being watched. The object then disappeared eastward and I ran to our house to tell my family. (being only 4 I was not taken seriously and the incident was dismissed. I have never forgotten it.) Also, this object was absolutely silent and appeared to be a little larger than the moon appears to be at its zenith.
Date of sighting is approximate.  PD