Mouse Ballerina

"Oh, Daddy! You made this just for me?"

- Olivia, upon seeing her birthday present

The Mouse Ballerina is a dancing doll built by Hiram Flaversham as a birthday gift for his daughter Olivia in The Great Mouse Detective.

Description
Initially, the toy has an appearance of a flower bud. When a key attached to the toy is wound up, the bud opens to reveal a dancing mouse as a dance tune plays.

The Great Mouse Detective
On the evening of Olivia's birthday, her father Hiram, who is yet to give her the present, instructs her to close her eyes before retrieving a toy resembling a flower bud from a cupboard. He then wounds up a key attached to the toy, and Olivia watches as it turns into a mouse ballerina that dances for her, to her delight.

When Fidget kidnaps Hiram and takes him to Professor Ratigan, the mouse ballerina is also taken to Ratigan. As Ratigan examines the dancing doll, he tells Hiram, who is forced to work on a project for Ratigan, that he plans to bring Olivia to where Hiram is imprisoned. When Hiram refuses, Ratigan, in anger, squeezes the doll so hard that its head pops out before yelling at him to get back on task.