Inside the 3D printed frame of the GlowBlaster is a 5 mW 405 nm module, an Arduino Nano ... 12 mm tactile button which causes the Arduino to fire the laser and sprinkle in a bit of theatrics ...

contains a laser range finder, digital compass, and a GPS module. The article also states that it contains a mini-computer but we recognize that as an Arduino Mega (thanks to Miguel over at ...