Xyla

Xyla is a special toy xylophone can be pulled by a string as while being played by Alma, Alma discovers that Xyla doesn't sound right as Doc discovers that one of Xyla's musical keys is loose as Xyla felt that without her key, she wouldn't be able to play music again.

Looks
Xyla is a ladybug-shaped xylophone with a red body, beige head and wheels, orange antenna and a few black dots and has 6 musical keys on top of her.

Trivia
When Xyla hops or jumps, her axles sometimes bounce off from her body.