Use 30 square sheets of origami paper.
Difficulty : ⭐⭐⭐⭐
Time: 3 hours
Each unit was designed to have hidden lock. Note that it might be difficult to assemble.
Model paper size:
Unit (black pattern) : 7.5 cm x 7.5 cm
Model height: ~14 cm
PrwOrigami - Kusudama Collection