Off topic:
You want durable that a kid can't destroy? Dude, you cannot destroy an A2000!
[Dude -- from the Old Testament/Torah: "Deuteronomy"]
The only things that could survive a nuclear winter...cockroaches and Amiga 2000's.

I vote for an A500 too. They are bigger, heavier and far more 'retro' than those newfangled A1200's.
Also consider a CD32 for easy of use.