Bubbles in the creek

The weekly theme is long exposure photography.  I haven't tried it before except with intentional camera movement.  I tried it today on water in a creek - not a very good result but likely the only chance I'll have.  I couldn't use my tripod because I lost the little rubber washer on the attachment for the camera when we were at Goldstream Park the other day so it wasn't a very long exposure.  :(   
I would like to experiment more if I get a ND filter and using the tripod.