Okay, I admit I went a little crazy, but I pulled these up in less than 5 minutes. This tells you the extent of my obsession.
water bore-holes in tumbled limestone
cherries (and pits!)
peaches (and the individual blackberry seeds)
double rainbows (okay, it is a quarter circle)
ammonite (this is huge and was found on my grandparents' farm in central Kansas)
rolls of fabric
...and MORE rolls of fabric!
a stack of plates
cross cut logs
Please start looking at your environment for all the circles that are in your life. Pick a few things out and draw them! I have more images on my blog so please stop by and take a look at even more cool, weird stuff! I can't wait to see what you come up with. Have fun!