When I was a kid, computers were a mystery. They were complicated and beautifully simple at the same time.  My first memory of computer class was LOGO. There was a turtle on the screen (a triangle) and you told it how to move with math REPEAT 4 [FD 20 RT 90]. It was beautiful. Video games scrolled left and right, with simple controls. The beauty and complexity was in the story, and not in the visual representation or game play. You gave wizards text commands, and got to unravel complex stories with multiple endings, but the input was always accessible. Type some text, push these buttons. Limiting the scope of possibilities gave them their power. See what you can build and create with constraints. That was always something that fascinated me.