DIY beachy buoys.
This is what we came up with.
We had some cedar logs in the backyard so that's what we used.
Kent cut the logs with a chain saw, first he cut the point then shaped the sides to a rough square.
Then he cut to length. We went with about 15-18 inches.
Random is the key, you don't want them to look to perfect.
We painted the rough surface with a good primer, then gave them a coat of white paint. After that I freehand painted the stripes . I didn't worry about being to neat, it looks more interesting and folky that way.
Kent drilled a hole big enough to put a 1/2" rope through.
To see more: http://cynthiaweber.com/easy-diy-beachy-buoys/