This is designed by Peter Keller. The steps can be found on his flickr page.
This "box" can be very convenient, except
1. It cannot open properly
2. It is not a box.
Such irony. Anyway, it still makes a cute decoration, being a chubby star like its mortal enemy, the TSU, and it has a wee little flower at the middle.
Kudos to my sister for helping me color the paper since she wanted to. XD