"Hickory Dickory Dock" is a traditional nursery rhyme that tells the story of a mouse that runs up a clock. The rhyme describes how the mouse climbs to the top of the clock, and when the clock strikes one, the mouse runs down. This playful tale is often used to teach children about numbers and the concept of time. The rhyme is popular in English-speaking countries and has been passed down through generations. It is often accompanied by hand motions or songs, making it a fun and engaging way for young children to learn. The clock and mouse are central symbols in this whimsical story.