Thank you for viewing my items! This is a supplement for Challenge 2nd Grade. The instruction manual is also included. It generates electricity on its own and creates light and wind energy. It's very interesting! How about using it for a summer vacation science 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 described in the manual.) For those who understand that this is a used item and are willing to use it, thank you very much! ※ I'm sorry, there is a little dirt on the box. ※ I also have other Benesse educational toys for sale. Please take a look if you'd like.