The Ogham, an ancient Celtic alphabet consisting of 20 characters or feda and 5 "extra" letters of forfeda. They represent sounds. It has a powerful connection to nature and the spiritual realm. Dating back to the 4th century, the Ogham was originally used by Druids as a means of communication and recording important information. Each symbol is associated with a specific tree or plant.
The druids believed that the symbols were given to humanity by the gods themselves. A more modern view is that they were created by the Druids as a way to encode their knowledge and wisdom. Whatever its origins, the Ogham has become an integral part of Celtic pagan practices, with many using it for divination, spellwork, and meditation.
Each letter has its own meaning and its own sound. You would ask a question, then draw a stick out. Each stave has a unique spiritual meaning to read.