It doesn't need painting, won't rot in the rain and can take a licking and keep on ticking. Attached are pictures of the obstacles I was able to make myself. Kenosha Wis. They have weekly study group and John Harmes gives a clinic there once a month. The Hula Loop is made using foam tubes which are normally sold as toys for kids to take into pools, I connected several to form a circle large enough for a horse to pass through. They are placed between two jump standards for support.
Many horses are very leery about walking under objects.
The first time my horse tried this, he stuck his head through the hoop, then got scared and threw his head into the air and ran backwards with his head hooked under the top of the loop. He ended up dragging the hula loop and standards several feet before it fell apart. For safety reasons when making these obstacles I make sure they will collapse if a horse does get tangled up into them. Flowers are inserted in the PVC poles and there is a plastic tarp with a grape leaf design on the ground. The cross poles are added to slow the horse down.