Product Overview Kids' Minnie Mouse ballet flats from Mini Melissa. The flexible 'Ultragirl' shoes are formed from patented Melflex plastic with a rounded toe, peep toe and 3D Minnie Mouse detail. The pumps are complete with subtle branding and slight heel. Product Details Melflex Plastic. Product Overview Kids' Minnie Mouse ballet flats from Mini Melissa. The flexible 'Ultragirl' shoes are formed from patented Melflex plastic with a rounded toe, peep toe and 3D Minnie Mouse detail. The pumps are complete with subtle branding and slight heel. Product Details Melflex Plastic.