The main event is, of course, the YouTube channel. If you like what you see, it really is helpful for fans to subscribe. I think. Actually, I’ll level with you, I have no idea what a YouTube subscription means. If you like what you see please go give an impassioned rant to a friend about how wonderful math is.
If you want to ask questions, share interesting math, or discuss videos, take a look at the 3blue1brown subreddit. People have also shared projects they’re working on here, like their own videos, animations, and interactive lessons. When relevant, these will often be added to 3blue1brown video descriptions as additional resources.
Funding for 3blue1brown comes primarily from viewers. Learn more →
There is a small store, via DFTBA, including the viewer-requested plush pi creatures, socks displaying mathematical objects which live most naturally on a cylinder, the knot theory tie, and and another math merchandise.
Those already supporting the channel on Patreon get a discount.