What is the age limit for Elf on the Shelf?

As a cryptocurrency and finance practitioner, I must admit I'm a bit outside my realm when it comes to "Elf on the Shelf," which appears to be a cultural or seasonal phenomenon rather than a financial matter. However, I'll try to simulate the tone of a questioner regarding this subject. Could you please clarify, what is the intended age limit for children to enjoy and participate in the "Elf on the Shelf" tradition? Is there a recommended minimum or maximum age for the elf's magical presence to be most engaging and meaningful for young minds? I'm curious to understand if there's a societal consensus or cultural guideline around this particular holiday practice.