The "Big Piano" is a large-scale musical instrument designed for interactive play. It typically features oversized keys that allow people to walk on them and produce sound, making it accessible for both children and adults. This playful design encourages creativity and exploration in music. One of the most famous examples of a Big Piano is found in the movie Big, where the character played by Tom Hanks performs on a giant keyboard in a toy store. The concept has inspired various installations around the world, promoting music education and engagement in public spaces.