Banging in to walls makes it hard to see how your program works

[benjohnbarnes]

I think my son (and me, to be fair) sometimes had trouble with understanding (particularly with functions) because our bot was banging in to walls. This is effectively breaking / changing what the abstraction does, which is something else to keep a hold of when you're trying to grok abstraction.

Perhaps the early dares using functions could remove the walls and use an arena you're unlikely to drive out of. They could be more about adjusting the program to see how changing the abstraction changes all instances, or changing the code between calls just effects that code.