"...Why not perl?"

Good question. Because the boy was a gamer? Sprite animation for best motivation. And i had actually only five days to build something with him. The rest of the time was for writing his report as well as visiting other workplaces in the company.

Regards, Karl

I see, perhaps Pythons pygame or processing if you're looking to teach something which will rapidly result in GUI/Animation type stuff.

Update: if they are into minecraft and you have a spare Raspberry Pi Getting started with Minecraft Pi.