Decorating cookies is a fun and creative activity that involves adding colorful designs and patterns to baked cookies. Common supplies include icing, sprinkles, and food coloring. People often use piping bags or brushes to apply the icing, allowing for intricate designs. This activity is popular during holidays and special occasions, such as Christmas or birthdays. Many enjoy making themed cookies, like pumpkin shapes for Halloween or hearts for Valentine's Day. Decorating cookies can be a great way to express creativity and share delicious treats with friends and family.