Bonsais are miniature potted trees or plants that are aesthetically shaped and maintained through techniques like pruning, watering, and repotting to mimic full-sized trees. The art of bonsai began in China between 206 BC to 220 AD and was introduced to Japan by monks in the 6th-7th centuries, where it grew in popularity. The cost of a bonsai can range greatly depending on factors like quality, rarity, age, and type, from $50 for a basic potted tree to over $500,000 for exceptional specimens.