I asked a friend who has more bamboo than he knows what to do with for some poles... He was more than willing to give me some.
This was my first attempted... It was 12 feet high...
My wife did not care for it sticking up so high.... so I built a new one that is 6 feet high.
I removed the grass and left holes.
Then I placed bricks around the holes and filled it with some potting soil.
The idea is that the beans I plan to plant will grow up the poles and create a fun editable place for my son to play or my dog to find a cool place to lay in.
The top was tied together with some twine... I just wrapped it and looped it a bunch... It seems pretty strong...