Arrangement Using "Found Object"

This month, we are continuing our studies of the basic style with the lessons: Variation #3 Upright Style Moribana (1st lesson) and Nageire (2nd lesson). The third lesson is a freestyle arrangement using "Found Objects," anything we can find to create Ikebana.
For example, Hata Sensei used a plastic egg carton to create a beautiful arrangement for her demonstration(first picture).

Hata sensei's other demo arrangement

My arrangement using a piece of plastic fence

Classmate's arrangement

classmate's arrangement

My granddaughter made these paper flowers.

Basic Style Variation #3 Moribana