The circuit for the laser sensor consists of three sensors grouped together to create a large enough "target" and a LED that will light up when the "target" is hit by a laser
When at least one of the three sensors detects that it is being hit by the laser for over half a second (as seen in the picture), the LED will light up indicating that the "target" has been hit
For the demo, I will be using a standard laser pointer, generally used for play with cats and dogs