With regards to kids, Betterman and Lain are most certainly not appropriate for them. Betterman is rather violent, and has some horror elements, and Lain is a little violent, plus one ep has a sexual scene in it. Plus, little kids wouldn't have a chance of understanding Lain's plot. I'm 18 and in college, and I still don't get it.

I'd assume Silent Mobius has some violence, but it MIGHT be ok for kids around 11-14. Be sure and screen it first.

Crest of the Stars has little violence from what I've seen of it. However, the plot has a lot to do with politics, so they might find it boring. Otherwise, it should be fine.

Never seen Dual, but it seems kid-friendly.

For older anime fans, be sure and check out Betterman. It's a great series. The whole block looks promising.
-NeoJericho-, The Ochijereon.
Defender of the Xbox, Funimation, and cute lil' kitty cats.
The Academy Awards: Failing to recognize quality since 1927.