Anyone remember choose your own adventure books? I loved reading those growing up.
This one:
http://www.amazon.com/Space-Beyond-C.../dp/0553231804
I actually remember this one. I thought it was so far out and strange. So many things in those books.
Reminds me of this sandbox topic because you never knew what you'd find on your next adventure. Sometimes it was crazy fun. Sometimes it was boring. Sometimes it was surprising. Sometimes it was WEIRD. And most importantly, you were the maker of the adventure. It was more interactive, just like sandboxy worlds.