I made an upright (so the pipe things on top of each other) by putting some upright posts in the ground so they were about 3ft and then secured the pipe things between them. Then using rope secured the tops of the uprights.
Use beer crates at the bottom ( always a fav of mine).
Tape or tie the bottom two pipes to them and the crates and sit the third pipe on top ( if it gets knocked it should roll off). You might want to weight it at the bottom with something though, or peg it to the gound, or a big gust of wind might blow it over. You could always add some old bike wheels for effect.