Parking enforcement officers commonly make these chalk markings on your tires to monitor how long a vehicle remains parked in a time-limited zone. This practice is called tire chalking ...

You need to try ‘Chalking’ – a DIY beauty trend that requires one thing only – a humble piece of chalk. Yes, chalk, that childhood essential for drawing hopscotch grids in the playground ...

What you need is the ChalkJET 9000, an ink jet printer on wheels. Using two Arduino Duemilanoves for the brains, this little cart features eight cans of spray chalk which can be individually actuated.