Thank you for viewing my product from among many others! This is a supplement for Challenge 2nd Grade. There is also an instruction manual. It generates its own electricity and creates light and wind energy. It's very interesting♪ How about using it for a summer vacation research project? ♪ All the parts are present, but the fluffy cup is broken. Please check the images and understand. (It's only used in one experiment in the instruction manual.) If you understand that this is a used item and are willing to use it, please consider purchasing it♪ ※ I'm sorry. There is a little dirt on the box. ※ I also have Benesse educational toys for sale. Please take a look if you'd like.