Amazon Fire stick is a modified version of Android, so you can install Android apps on it. But not all apps might work due to compatibility issues.
Bartolito - Music, Song and Video for children is a Video Players & Editors android app developed by MyoStudio. The latest version is 1.1 and the it requires a 5.0 android version to run it. Children's song, Bartolito the rooster and the farm, in spanish. Without Internet. Try it.. Bartolito was released 3 years ago, and is available for Free.