I have a few things from my childhood, but we moved a LOT and stuff got chucked left right and centre.
DS has enjoyed playing with my weebles playground set, MLPs, pull along happy dog, Pound Puppy, medieval Playmobil with horses.
Nothing of DHs has survived childhood, again lots of moves plus he's got 5 siblings and a lot of stuff broke.
For future possible GC, I've saved the MLP and Weebles. From now: Lego and Playmobil will be saved and some books. DS' wooden train track was from IKEA and has gone to a friend's LO, ditto some boardgames. Plus the Lidl wooden marble run and the giant plastic monstrosity marble run we got last month, DS has grown out of such stuff, sadly.
We don't have an awful lot of space for keeping stuff, plus when DS moves out (ages away, he's only 9yo!), we'll downsize.
My DF is one of 9, my GPs had two dollhouses and a stack of toys under their stairs, kept us entertained for days in the once-a-year visit. Many many happy memories.