I love this project and have been doing these today with alcohol inks. I paint gesso on a sheet of bristol paper, but card stock would work great too. After it’s dry, I take small felt pads on a stamp block (made my own with sticky velcro
You begin with a very abstract watercolor and after it has dried you go back with India ink and a bamboo skewer (? did she mean bamboo brush - not sure how you would paint with a skewer) and create flowers.