My daughter was obsessed with this when she was in her "space phase." She loved how she could project different images of space on her bedroom wall. It looked so cool with the lights all turned off! There is also a place for it to give you facts about space audibly through the speaker. You can take quizzes to learn more about space and planets. While it has been played with, there is nothing "used up" about it and is in great condition! It takes 6 batteries. There is a place on the bottom to store the projection disk.