[nicholassmith]

When you as a child stand on Lego you learn that you should tidy things away when done, when as an adult you stand on it you learn that you need to have a talk with the kid about tidying things away. Or to tidy it away after you've built another spaceship.

[lutze]

And when an adult stands on it in front of the kid, the kid learns lots of interesting new words!

Lego: you're never not learning.

The only real problem I have with Lego is the price of some of the items. A cursory search will bring you across £500 Technic sets... which is utterly bloody ridiculous.