Use 30 rectangle (2:3) sheets of origami paper.
Difficulty : ⭐⭐⭐
Time: 2 hours
 
Helium as in nuclear fusion on the Sun and blow as a balloon gas.
 
Model paper size:
Unit (yellow) : 5 cm x 7.5 cm
 
Model height: ~15 cm
 
PrwOrigami - Kusudama Collection
www.prworigami.com
(November, 2021)