That is so cool Cinta!
The little Starfish or Earth Star Brom's are on of my favorite plants too. (Cryptanthus bivittatus) I've been growing them for years, and they are so multi tasking;...from miniature gardens to cool tropical plantings along with many succulents that have the same needs. I feel they have been far to overlooked for what they have to offer... (-: }.
I love the planter, and those little guys absolutley thrive in Orchid type mediums like Pine bark fines with a little course sand and a small dash of peat moss added too.