Hah! I have three grandsons, 12, 10 and 6 yrs old. I just learned the 6 yr. old and his neighbor friend have started a diecast junk yard (his words). The basically trash cars to put in the junk yard. So now I tell him the diecast cars I give him are collectors, and that way they stay out of the junk yard. I could probably finish my project Cuda with the money I have spent on diecast for these boys.
But, hey, set up the train. I have a bunch of stuff "still in the wrapper" and I can't take it with me, and I sure don't want it buried with me, so starting to pass it on the the grandsons, slowly, but surely.
One of my best memories of Christmas was coming down Christmas morning and finding a train set up under the Christmas tree. It was a used clock works steam loco and tin type cars. Of course, only the cast loco survived my childhood. It sure was fun though.
