Presentation of some projects of self-made lasers built in own garage: Neodymium-YAG, Ruby, He-Ne, Carbon Dioxide and Semiconductor RGB. Explanation and dimonstration of their functioning and construction techniques. Free consultancy, support and useful information provided to everyone who desires to exploit this fantastic technology which foresees multidisciplinary skills, passion, curiosity, patience, and ability which go from quantum mechanics, optics, electronics, precision mechanics, vacuum technology, high voltage and cooling technology. Practical demostration of the lasers in function and Transmission Holograms made with the selfmade lasers. Demonstration of a self made Nitrogen Laser working at atmospheric pressure made with simple and very common materials (glass panes, plastic sheets, aluminum foils, metal rulers) which emits very short pulses of ultraviolet light (337nm).