The recent Nestle competition saw GPS chips fitted to six chocolate bars. Working on the basis that a signal is emitted once the bar is opened, the winner will be found and rewards with £10K cash prize!
I think this is a fun concept but would require high technology and a large budget in order to pull it off, which is something the brief has asked you to take into consideration as 'It's Nice That' is a small company with a small budget.
