I enjoy doing scientific outreach as much as I can! You can find a few fun things I did for that purpose in this page.
Hyperbolic crochet
Hyperbolic crochet was first proposed by the mathematician Prof. Daina Taimina as a practical, beautiful and (in my opinion) very fun way to represent mainly hyperbolic surfaces (but it can also be used for any type of surface; crochet is super versatile!)<
As a compulsive crocheter I had to try to make some myself of course - and get my fellow PhD students to crochet as well.
I found a lot of information on this, as well as other creative ways to represent surfaces and other kinds of creative math here, here and here
(not an exhaustive list).