I am looking for the name of a cartoon movie that was made back in the 80s or 90s about a brother and sister playing in the attic and finding a truck with a map and an explorer's hat and then they are transported to a world with talking animals. I remember that there was a Monkey, and a St. Bernard that carried Hot Cocoa around his neck.

I'm not sure but it sounds like it may be one of the raggedy ann and andy movies or specials.

Possibly,...

The Wild Puffalumps (http://www.toonarific.com/show_pics.php?show_id=3931)