A chip with the size of one euro coin, to use as a token for a shopping cart/trolley. Same thing as http://www.thingiverse.com/thing:35832 but with an inscription and with openscad files. It uses the MCAD/fonts.scad library for that.The version with the handle works on 50% of the tested shopping carts/trolleys only. (There was on cart that accepted the coin in a tray of some sort, so the attached handle makes it not fit.)Either choose your version (with or without handle) from the stl files or take the scad file and set the parameter handle according to the type of trolley you find at your prefered super market. While you're at it: you might want to change the silly inscription on the coin.Render (only if you took the scad file), slice and print it at 0.3 mm layer height with ABS. Go shopping. (But don't be so unfriendly to abandon your shopping carts/trolleys just anywhere, only because you can print a new chip...)