Blimey, THE PRESSURE!! Now whatever I say will sound downright stupid! Because unlike the sounds you've listed, mine are usually made up. Made up ones could be, glackle (say it out loud twice and you'll see what I mean! i hope), glackit glackit, chickutt chickutt. When I say those it sounds like a jar of marbles but maybe it only works for me!
Real words: chink, ker-plunk (is that a word?!), clatter, clack?