I'd highly recommend Twizzle. You just tell them exactly what you want and they do the rest. Not cheap but I used them in my old job every year for our kid's Christmas parties.
I used to cycle in Central London a long time ago - always stopped at traffic lights, always stopped at zebra crossings. Got dragged off my bike in Charing Cross Road once, came to a blooded heap outside Central St Martins! I'm sure IO inspired a few art projects that term. Haven't cycled since, dar...