Use 20 square sheets of origami paper.
Difficulty : ⭐⭐⭐
Time: 1.5 hours
This is Triangle Unit Jitterbug designed by Tung Ken Lam.
Model paper size:
Unit (pattern) : 7.5 cm x 7.5 cm
Model height: ~11 cm
PrwOrigami - Kusudama Collection
(August, 2021)
Jitterbug Kusudama
SKU: B489
See a diagram from British Origami.
https://britishorigami.info/academic/davidpetty/origamiemporium/lam_jitterbug.htm
See also bilibili video.