Here. I used to show my grandma articles like this when a Nigerian prince was trying to let her in on big money making opportunities.
https://www.wired.com/story/momo-hoax-viral-scares-advice/
HOW TO NOT FALL FOR VIRAL SCARES
Regardless of the hoax. The picture of that "mother bird" sculpture and the context of the videos themselves are ridiculously unnerving to look at and think about... So it's more like a monster under the bed, compared to money in Nigeria. Fake nonetheless, but probably quite scary to younger minds nevertheless.
https://www.popsci.com/why-momo-creepy-scary