I absolutely loved Lego as a kid, played with it an awful lot, and got huge fun and pleasure from it. In those days, you simply bought many boxes of generic pieces (or persuaded your parents to buy it for you) which you used and re-cycled endlessly depending on what you wished to construct.
Hardly any of the pieces were limited in use, and could be used for a multitude of things, limited only by your imagination; moreover, the idea that you simply constructed what was pictured on the box - or, were supposed to be limited to that - was completely alien to us.
Nevertheless, a great toy - and one, which as the time, was seen as gender neutral, so my brother played with it, too, as did male and female friends of mine. My parents thought it a positive, healthy, constructive toy, and so were completely open to the idea of supplying more as needed.