Kickstarter: What gets you to pledge?

[CourtneyHahnCanArt]

Hi,
I'm looking to start a Kickstarter campaign as soon as I get finished with my book. (Which is pretty far away but I want to get a head start.)

I was wondering:
What kind of Kickstarter pledge rewards get you to pledge?

What have you seen that's interesting and original that just made you said "I've gotta have that and I can pledge that amount"?

Is it a set of special post cards? Or maybe a bookplate?
I'm curious.
Let me know.

-Courtney