TOD:
I've managed to hold on to several of my absolute favorite toys from when I was a youngen. First and foremost of my favs: my Lego set, still in its original box. While it's an amalgamation that includes two smaller sets, it still holds the original large set contents. I also have my Erector Set, my Matchbox and Hot Wheels cars (and collector cases), a beat-up Zeroid, most of my View-Master wheels and viewer, and the WhirlyBird Helicopter.
What I wish I still had: the Ideal version of the Lost In Space Robot, my G.I. Joes (especially the Mercury Astronaut and Space Capsule), my Beany doll (of BEANY AND CECIL), and the Time Machine (with the little plastic cubes that would open up and expand into various monsters, robots, dinosaurs etc.)