Youngest asks me if people can be deaf and blind, I was like "Yes they can. Can you imagine not being able to see or hear? They have a special sign language that's by touch."

I went looking for a video and found that in America at least, it was finger spelling until a 'pro-tactile' way of speaking ASL developed quite recently. Here Oscar says that it's "like going from dial up to broadband!":

https://youtu.be/9GrK3P15TYU

I wonder if a similar tactile variant has happened in other sign languages?

Pro-tactile ASL: A new language for the DeafBlind

YouTube
@sarajw Both my daughters really benefitted from Baby Signing Time. It’s super baby-centered, of course, but really did the job at a super young age. I even still remember many of the songs!
@geoff aw! I bet that was fun. Sign languages should be offered as one of the languages to learn at schools, tbh.