The movie with the acid rain, I believe, was called "All in a Summer Day".
I think all of mine have been suggested here already, but:
(Jim Henson at his best)
(Jim Henson's masterpiece)
(first one and second one only, the rest were crap)
(murdered by Pirates is good...and the best swordfight in a movie, EVER)
(another Spielberg classic)
(the one with Gene Wilder, not creeptastic Depp)
(though watch the ages...it has a horror motif too)
(great film, until they actually meet the aliens)
(they'll see being older isn't all it's cracked up to be)
(Just kind of neat)
Old Disney movies are good, when you can catch them out.
Also, don't discount the cartoons of old, whether Bugs Bunny, Tom & Jerry, or some of the best 80's cartoons like Robotech, ThunderCats, Transformers,
GI Joe, etc. (many of these they've remade, but I'm talking about the originals)
Older boys may like some of the older 80's TV shows, like Airwolf, A-Team, Knight Rider, Riptide, or some of the sci-fi ones like Manimal, Mr. Merlin
(good luck finding this one), Powers of Matthew Starr, Automan, etc.
edit on 3-4-2012 by Gazrok because: (no reason given)