I still have the Marklin HO model train from my youth. 40 years later it still works and kids love it (when we take it out).

One winter we mixed it with Lego from the Harry Potter series and pretended the train was the one going to Hogwarts.

Toys that still work 40 years later are amazing.

Younger parents who didn't play with model trains are also in awe. For those who have enough room it's really a nice thing to do to play together with your kid(s).

It s not crazy pricey either if you don't go wild.