Laser guided slingshot? Oh yes.
Although this may be a bit of a "why bother?" type of project, I think that night-time BBQs and other parties could be livened up with this little beauty. I say night-time as it would be much easier to see the laser on a target. You could also use the aforementioned LED glow sticks to light up the playing field. The days of shooting cans with air rifles is over, my friends.