Legos have to be simply the coolest toys on the planet.
I've recently got my kids into them. My son has a couple of the new, smaller, Star Wars sets.
So the other day the wife came across an old box of Legos I had up in the attic (Legos I bought as a younger adult) and we go them out for the kids.
My only Star Wars set:

I've found that they have since updated this and made it even cooler . . . but all I really wanted was a Lego Boba Fett, because the guys are just the coolest.
My train set:

- My first train set!
I've always been in love with the Lego trains. I wish I made more money just so I could buy more Lego train stuff.
Of course, I remember just ten years ago you could go to the Lego site and find all kinds of different train engines to buy, multiple steam engines, but now there's not really much of a choice. Which is too bad.