When I was small, I didn't have Lego. I had empty cans and wood, and pots... and played. Lego existed, but hadn't reached America yet...
When my kids were small, we worried about them choking on it. But... they got older and Lego got better.
Anyway, kids today have a wonderful play system.
Here's a 17 minute animated video which tells the story of Lego.... and of more: Stick-to-it-iveness, innovating, being open to ideas... well worth seeing, imho.