The disc change uses the mysterious alien flying saucer as the source of inspiration and design to achieve the harmony and unity of fun and actual use through assembly and variability. The legs can all be assembled into cool UFO seats. When one of them is removed, it becomes a comfortable backrest sofa for reading and drinking tea. When all are removed, the curved rubber bottom can be used for children to play happily. There are more ways to use it waiting for users to develop it themselves. The future sense of technology will be integrated into the daily home to cause topics and at the same time show more cool and energetic personality.