Personally I’m in favour of building a house from lego at the bottom of the garden where all the stuffed toys can live but the dc aren’t appreciating the genius of this solution. 
In the meantime is there some kind of logical and simple way to organize it all that 3 unmotivated dc and an adult who can’t distinguish ninjago from chima can all manage to follow?
We’ve tried the Oh FuckIt (trademark) system of leaving it all over the floor. But despite the obvious advantages of free burglar proofing, it feels time to try something a bit more sophisticated.
So what works? Sorting by colour? By stud combinations? Filling a skip?