If you can layer various mechanical junk of the appropriate kind, it can give a cool steampunk look. Like gears, insides of old clocks. I like the glasses here with just a bunch of screws, the others are cool but harder to replicate:
ASU2003's link has a cool guitar...so even a toy plastic guitar could be jazzed up with parts from the hardware store to be steampunkish:
This has some cool steampunk objects: