You can print out this wonderful set of illustrations by the incredible Brian Kesinger and use them to customize your city-themed See N Say!

Matte finish vinyl sticker paper for laser printers worked very well for me -- I used the "heavy paper" setting in the print dialog to make sure the toner bonded well with the paper.

If you'd like to use other graphics, import the graphic above into a graphics editor at 100%, change things, then save.

Print at 100% size, cut carefully with a hobby knife, and peel and stick, being sure to smooth out bubbles as you go.