The meme called the 'four generations challenge' shows kids getting together with their parents, grandparents and great-grandparents to show off how many generations exist in one family.
It started in China but has since spread to countries all over the world. Some videos have up to 20 million views.
But how big is your family? We want you to do your very own Newsround generations challenge!
Get as many generations together as you can and send us your videos or snaps!