There are lots of clamping accessories for you to mount all sorts of things like extra toms, cowbells, tambourines, cymbals, hi-hats and so on. And they mount to your cymbal stands so you can essentially hang more stuff off the same stand. The only limitation is your creativity, available space and how you balance the weight load. The downside is some of these parts are rather expensive (i mean they are just pieces of metal), or at least the Tama ones i bought a long time ago. Sometimes it might actually end up cheaper (and more stable) to get a another new cymbal stand altogether. Just my $0.02.