The batteries consist of two different metals in suspension in an acid solution. Copper and zinc work well as metals and the citric acid content of a lemon will provide the acid solution. The zinc nail and the copper coin are called electrodes and the lemon juice is called electrolyte.

3D printer is a machine capable of “impressions” of 3D designs, creating pieces from a design made by computer models.

The most beautiful actress of '40 should be remembered not  only for her 6 husbands, but also to be the inventor of principles used in nowadays wireless links.

The video presents the achievements Dimitris Chatzis, a student from Kavala, who is considered the youngest creator of human like robot in the world. In addition, an innovative project for energy saving prepared by a group of pupils is also presented.

The video presents shortly the national robotics pupils' contest, whose finals took place in Athens. The contest relates to the development and presentation of pupils’ projects that combine robotics, mathematics, mechanical engineering and technology. 

This video, from the Portuguese Engineers Association, presents Chemical and Biological Engineering and generally describes the profession of an Chemical and Biological Engineer and his present contribution to social and economic development

This video, from the Portuguese Engineers Association, presents Mechanical Engineering and generally describes the profession of an Mechanical Engineer and his present contribution to social and economic development

This video, from the Portuguese Engineers Association, presents Computer Engineering and generally describes the profession of an Computer Engineer and his present contribution to social and economic development

This video, from the Portuguese Engineers Association, presents Forest Engineering and generally describes the profession of an Forest Engineer and his present contribution to social and economic development

This video, from the Portuguese Engineers Association, presents Civil Engineering and generally describes the profession of an Civil Engineer and his present contribution to social and economic development