The Vibrant Rainbow Shell

Mysteries and paths it has followed,
Places it has been,
Where was it before now?
Maybe with a thief,
Then dropped in the ocean,
Collected by a dolphin,
And brought to the shore,
Making its own adventure as it goes.
The vibrant rainbow shell,
Is making me happy,
And is cheering me up.
The vibrant rainbow shell,
Is now in the hands of mine.