this summer I have a lot of free time, I live in amsterdam and was thinking about doing some study on offline marketing. I can use a car, bike , motorcycle and a plane (what a plane? yes my mom has one..) I want to test a few things: 1. walking with a shirt in amsterdam all day 2. stickers around the dam and kalverstraat 3. flyer's 4. flying over amsterdam and the dutch shore with a plane ( I assume you understood I would use a plane for that)+ big banner behind it any more suggestions? I am very interested myself what these results will bring compared with the costs. since I can get the most things free like the plane I am not losing a lot money.