I was playing basketball on a school playground and it was a crystal clear day when I noticed a really bright glow out of the corner of my eye that immediately caught my attention. I stared at it thinking it was the first star coming out. The object appeared to have a grey-ish hue and appeared to roll over after I was staring at it. After rolling over it was completely invisible. I thought that was strange but continued playing and was left wondering what I had seen. Not even 15 minutes later the object appeared in roughly the same area of the sky and was just as bright as before. It really didn't move much at all, it seemed to cloak when it started to turn or move. My thoughts were that it could be a balloon just floating and reflecting light and maybe it popped and fell but when it reappeared and disappeared in a turning motion I knew it was some type of craft.