Related:
There's a cheesy children's book called Death is Wrong
Also, in this thread several people recount precisely what events in their lives caused them to become rationalists. Influential books include:
It's not clear to me why many efforts to raise the sanity water line are focused on adults. It seems like it would be more effective to try to teach children to think more like programmers, engineers, and scientists. I intend to use this sort of thing whenever I owe obligatory Christmas/birthday gifts to satisfy cultural norms.
I've been watching Steven Universe with my fiancee (a children's cartoon on Cartoon Network by Rebecca Sugar), and it wasn't until I got to Season 3 that I realized there's been a cryonics metaphor running in the background since the very first episode. If you want to introduce your kids to the idea of cryonics, this series seems like a spectacularly good way to do it.
If you don't want any spoilers, just go watch it, then come back.
Otherwise, here's the metaphor I'm seeing, and why it's great:
In the very first episode, we find out that the main characters are a group called the Crystal Gems, who fight 'gem monsters'. When they defeat a monster, a gem is left behind, which they lock in a bubble-forcefield and store in their headquarters.
One of the Crystal Gems is injured in a training accident, and we find out that their bodies are just projections; each Crystal Gem has a gem located somewhere on their body, which contains their minds. So long as their gem isn't damaged, they can project a new body after some time to recover. So we already have the insight that minds and bodies are separate.
This is driven home by a second episode where one of the Crystal Gems has their crystal cracked; this is actually dangerous to their mind, not just body, and is treated as a dire emergency instead of merely an inconvenience.
Then we eventually find out that the gem monsters are actually corrupted members of the same species as the Crystal Gems. They are 'bubbled' and stored in the temple in hopes of eventually restoring them to sanity and their previous forms.
An attempt is made to cure one of the monsters, which doesn't fully succeed, but at least restores them to sanity. This allows them to remain unbubbled and to be reunited with their old comrades (who are also corrupted). This was the episode where I finally made the connection to cryonics.
The Crystal Gems are also revealed to be over 5000 years old, and effectively immortal. They don't make a big deal out of this; for them, this is totally normal.
This also implies that they've made no progress in curing the gem monsters in 5000 years, but that doesn't stop them from preserving them anyway.
Finally, a secret weapon is revealed which is capable of directly shattering gems (thus killing the target permanently), but the use of it is rejected as unethical.
So, all in all, you have a series where when someone is hurt or sick in a way that you can't help, you preserve their mind in a safe way until you can figure out a way to help them. Even your worst enemy deserves no less.
Also, Steven Universe has an entire episode devoted to mindfulness meditation.