I love trying to imagine everyone's favorite sounds. Big Dice! I used to have a Buick Electra 225 (more happily known as the Deuce & a Quarter) which rumbled in a wonderful way, especially when the convertible top was down. Uhmmm, best car I had.
Roger, about the Singing Bowls. Oddly enough, I was looking up places to stay in Scotland and somebody there had a website about his collection of singing bowls. I've since seen them in Woodstock, NY and in Seattle. I'm sure they're in Santa Fe & Taos.
They used to be had for a song (haha) according to my first source, but now they're expensive, especially the old large ones; and many are probably in museums. They are deep metal bowls with a smooth edge. You rub or roll a wooden stick or mallet around the edge and by carefully letting the bowl rest in your palm, you can make it vibrate. Exquisite (to me) sounds can be made. The first time I heard them was on the 'net, so I can try to find a link.
I've been allowed to play them in the shops, but I haven't purchased one... yet.
The Alpenhorns sound interesting. I like the sound of the Australian didgereedoo, at least as heard on recordings. I suppose in their element they'd be even more fantastic.