TIC24 Programming APP Inventor

Let's take a preview: MIT App Inventor

An intuitive, visual programming environment that allows everyone – even children – to build fully functional apps for smartphones and tablets.

Let's start: http://ai2.appinventor.mit.edu 

How can I use it at my PC?  Is there any emulator?  Do see this Youtube.

Features of APP Inventor:

http://www.juntadeandalucia.es/averroes/centros-tic/21700290/helvia/sitio/upload/tema_app_inventor.pdf

Let's start with projects:

https://codeweek.eu/docs/spain/guia-iniciacion-app-inventor.pdf

Google Sites (A lot of stuff):

https://sites.google.com/site/appinventormegusta/primeros-pasos