Big Sis Princess and Big Bro Prince Mice. ($28 each). The Princess Big Sis and the Pea gift set is always a fabulous gift. ($55) Adorable royal twins, a boy and girl, in their own matchbox. ($42). Little Sis Ballerina in her "Little Miss Mouse" box. ($30). Big Sis Ballerina ($20) comes with a Lilac outfit and a mint outfit adorns the lil sis Ballerina ($18).  2024 little sis ballerina has an off white tutu $18.