I dont know why these people aren't taking you seriously...

1. a spring, it's a cool idea
2. a snake, seen that a few times at tattoo shows
3. my mate has - I (heart) 2 (bone), obiviously with pic's of heart and bone.
4. A tape measure or ruler, obviously not to scale as you want it to look longer.
5.a piano accordian.

i'm outta ideas..