Use 30 rectangle (1:2) sheets of origami paper.
Difficulty : ⭐⭐⭐
Time: 2 hours
 
This is Regenbogen designed by Maria Vahrusheva. 
 
Model paper size: 
Unit (pink) : 3.75 cm x 7.5 cm
 
Model height: ~ 9 cm
 
PrwOrigami - Kusudama Collection
www.prworigami.com
(January, 2020)