Scratch is a programming language and an on-line community where children can programme and share interactive means, stories, games and animation with people from all over the world. When children create with scratch, they learn how to think creatively, work in a collaborative way and reasoning sistematically.
Scratch is designed and mantained by the group Lifelong Kindergarten from the MIT laboratory.
Google App Inventor is a Google Labs platform to create software applications for Android operative system. In a visual way and from a set of basic tolos, the user can link a series of blocks to create the application. The system is for free and can be easily downloaded from the web. The applications fruit of App Inventor are limited by their simplicity, although they allow to cover a great number of basic necessities in a mobile device.
App Inventor may have their first application working in about one hour, and more complex applications can be programmed in a much shorter time than with the more tradicional languages, base don text.