Birthday candles are small, typically made of wax, and are used to celebrate a person's birthday. They are often placed on top of a birthday cake and lit before the birthday person makes a wish and blows them out. Each candle usually represents a year of the person's life. Traditionally, the number of candles corresponds to the age of the individual celebrating their birthday. In some cultures, it is common to add an extra candle for good luck. Birthday candles come in various colors and designs, making them a fun and festive addition to any birthday celebration.