I know I'm already picking stuff up/packing stuff away for them when they are older - if they are interested. I mean, they might not have the interest in Star Wars like I did, but I couldn't imagine having this many figures/ships/etc. to play with when I was a kid - it would have been fun .
My dudes are only 7+ months old, so this is something I've been wondering too...
Like you're doing, I started picking up the GH figures and packing them away in the hopes that one day I'd have someone to play with them, so those figures will be handed over to L&L when Mom determines they are big enough to play with them (they'd have them now if I had my way
).
As for the basic figures/ships/playsets, I have no idea what to do... I don't think I'll let them have free reign of the SW room, but I can see myself doing something similar to Travis and "handing-down" some of the older sculpt PotF2 figures to the boys so they have their "own" figures for playtime.