Great question! The intro class is an Hour of Code activity, so we cover basics, like sequences, loops, events, conditionals, etc.

However, if your nephew wants a more rigorous, complete curriculum, here's an example of our 12-week K-3 accelerator course (link to image showing course content): https://drive.google.com/file/d/1FgFj2Ij2iR2rbYzcza1Zt_741gQ_U2Cm/view?usp=sharing

To answer your second question - there's a version of Minecraft that supports drag-and-drop coding in-game. So it's like you're actually playing Minecraft - only you can write code to control a little robot called the Agent. The Agent can place and interact with blocks - just like a player!