Project Loon, launched by Google in New Zealand this weekend, is an experiment that aims to give internet access to mobile phone users via balloons floating in the stratosphere. It's designed to bring Wi-Fi and mobile signals to remote areas that are currently off the grid. Google has launched 30 helium-filled test balloons above New Zealand to test the possibility of having a global network of balloons floating 12 miles above Earth. People connect to the network using a special internet antenna attached to their building. The idea is that the signal bounces from balloon to balloon, then back to the internet on Earth.