Sometimes, they just want what they didn't have (couldn't have,
couldn't afford, didn't have time for this when they were younger -- as a kid or as an adult).
I know a woman who raised so many children she didn't know what to do. Times were hard for the whole family. Ya know, stuff like that did and does happen!! Once the children were grown, she started
collecting dolls - ---- representing I'm sure all the dolls she never had as a child, and all the ones she couldn't afford to buy for her daughters. No one ever really 'questioned' this -- cuz it is/was
pretty easy to see/know the way [if you knew her and her family].
They just accepted it, and were happy for her. She didn't 'play' with them, they were a symbol. She didn't obsess about them. And then of course family and friends started giving her ones as gifts,
and so it was. No harm, no fowl.
@Conflict Said
All I can say is I don't know the way of thinking that makes people buy toys, however sophisticated for themselves at such a late age, and I don't want to know it because I don't have the experience to sympathize with it.
I mean, this man worked in a factory, making doors, he helped put submarines together, he worked with the first air tube operated computers. You would expect a man of his age to want to keep more adult mementos of vehicles, having worked with them for much of his life. There is a time and an age for everything and sixty is not one to buy a toy for oneself.