Danger Laser.
This is a 200 milliWatt laser pointer for sale for $97 on this website. Why would anyone need a laser that powerful for a Power Point presentation? Most laser pointers from your local office supply store are 5 milliWatts, which is more than enough power for making your point.
Even meager 5 milliWatt laser pointers can blind you. A 200 milliWatt laser will do permanent damage if you point it into your eye for any length of time. That's why serious laser engineers wear goggles.
It's against the law to sell laser pointers to minors in New York City.
It shall be unlawful for any person to give, sell or offer to sell or cause any person to give, sell or offer to sell a laser pointer to any individual eighteen years of age or younger.