This is a 6th-grade challenge textbook. You can learn about the reflection and refraction of light, and color mixing with the three primary colors, while having fun! I think it can also be used for summer vacation research projects. I have confirmed that the lamp works. I plan to wrap the entire item in cushioning material for shipping, but the thickness is a bit tricky. If it doesn't fit in the mailbox, I will wrap only the white apparatus with cushioning material and put it in a plastic bag inside the Light Master box for shipping. ★ I have other items for sale as well. If you purchase a second item at the same time (bundle discount), I will discount it by 200 yen for items that can be shipped together. Please understand that this item has been stored at home for a long time before purchasing.