If you have used MIT App Inventor (and of course you have!), you can quickly adapt to using Blockly for programming.  Blockly is basically a “Drag and Drop” code editor (like in App Inventor), providing a visual programming system. It uses the same ideas as MIT App Inventor.

To see it in operation, visit MIT’s Scratch project to create a simple program.

Google has released code libraries that, when combined with other tools, enable use of Blockly to create code for the web, for iOS and Android. For iOS you also need XCode and for Android you need Android Studio. Blockly is not a programming language itself; it outputs code in JavaScript, Python, Lua and other formats.

Source: Google Developer’s Blog

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(FYI I am half way through my period of traveling too much and not getting much programming done!)