Today a co-worker brought in a 1965 copy of Avalanche into the office. After pondering about this marble game that's actually 3 years older than me, we set to playing.
It's actually a great little filler. It's on a level with something like "Connect 4" in that it's obviously a toy and easy to play. Explaining the rules took no more than 20 seconds and off we went for a two player, quickly followed by a three player game.
Dropping the marbles in the top of the game gives a nice satisfying click-clack sound as they drop down the chutes and hit the swinging gates. When you get a bunch of marbles to drop in one hit it's satisfying, even if they are not the marbles you need.
During our three player game I managed to apply tactics, in that I noticed one other player was the only chap collecting blue marbles. So I actually concentrated on collecting blue by inserting red and yellow marbles ( the colours I was after ). I was able to keep him from winning but and only squeezed a second place out for myself.
After two plays, I'm quite sure this is a game I'll pick up myself if I see it in a shop somewhere. Great for kids, and a good little filler for me!