Blue ball drifted down to within reach, backed away as I reached then shot away after I reached again.

I noticed a blue ball about the size of a walnut sort of floating what appeared to be aimlessly about fifteen feet above me. As a child I thought it was some sort of toy that had gotten away from someone. The closest thing that I had ever seen to it at that time was my uncle's fishing bobber. The object sort of float-drifted down toward me kind of like a blown soap bubble. When it got to about eye level it stopped about three feet in front of me. I wanted it so I reached for it but it backed up and stopped again. This time I grabbed for it but it zoomed away quickly and was gone. I have no doubt that it "knew" to get out of the way for its safety. It startled me when it made evasive manouvers. Also the color was a light blue off color, great for aerial camoflage. No one has ever believed this story. It is true.
Witness indicates that the date of the incident is approximate.  PD