I'd make planes, cars, ships, bulidings...even had those "roads" that are featured in your scanned catalog. When I was bored (that is, too much stasis in "Lego-Land"), it was natural disaster time!
Chaos!
(It) will explode like a thousand suns
I have become Death, Destroyer of Worlds!
And then from the debris, comes new life. New bulidings, new cars, new happy Lego people. They are unaware of any previous disaster, nor are they prepared for the next Big One.
Good to see that Legos are still popular. After Matchbox/Hot Wheels cars and Atari, I really didn't need too many other toys for rainy days when I was younger.