One Question About Laser

On Youtube, I saw a guy use a laser pointer pen to light papers and burn the balloons in arrow. That is the best laser pointer I’ve ever seen. With the growth of online shopping, people like to buy laser pointer from online shops where to buy electronics at a low price. With a 20mw green laser pointer you can train pets, with a 30mW Green Laser you can do presentation and with a 50mw green laser pointer pen you can use it at the party. Anyway, a laser pointer is of great use. But who can tell me where to buy this kind of lasers which can light papers and burn the balloons in wholesale?