I've bought a couple of bulk LEGO bundles with the idea of gathering up the identifiable sets, printing out the instructions (via BrickSet or similar) and then giving them as presents to my kids over the years along some of my sets from when I was a kid. However, very few of the sets I can identify from this big pile of bricks are complete. Some of them could be completed with the wrong colour pieces. What I'm trying to work out is a a good strategy for giving these bricks to my kids. I could give them a scoop of random bits every now and again. Or build the sets with alternative parts (but then the instructions won't quite match), or try to buy the missing parts from BrickLink/BrickOwl. Any other ideas?
There's also a tonne (well, 200+) of minifigs, I have thought about making treasure hunts to find new parts every now and again.
Slight complicating factor. My son is 3.5 and daughter 1.5, so I'll be giving him some now, but will have to keep some back for her until she stops trying to eat them.