A target is a very useful trick training tool. This video describes what a target is, how to make your own very cheaply and shows some examples of how I use them in my training.
If you want to use pool noodles in your training and your horse likes to nibble on things then wrap the noodle in tape. That way if won’t be able to bite bits off it.
Some other good targets are cones, plastic bottles and dog toys (like balls).