must admit when I read the title of the thread I thought you had set up some crazy SE Asian biotope for a betta and was expecting to see some cool pictures, not the bad news your daughters pet had died.
Go for it, even the most elite elitist would consider a 4 footer with 2 shrimp to be understocked ?
Maybe keep the betta theme going and set up an Asian rice paddy or bamboo forest type scene, I don't often see proper south East Asian biotopes anywhere.