it's interesting that different things have value now, your father and brothers would have made out if she had accumulated Lego sets and not let anyone unbox them.
Yes, apparently collector's value arrives in generational waves.
The first wave hits in 20-30 years, when kids grow into productive age, and sentimentally overvalue things from their childhood.
A grandma's rug or ex-libris, is your Lego set or another man's C64… What will today's kids feel sentimental about in 30 years? Better start collecting now.
Only the waves that speak to our craving for beauty and immortality are a safe bet at any time. Beautiful beginnings are where it's at!
Whats interesting is that there is not much to collect anymore. From a third party vantage point it seems childrens entertainment has been devoured whole by mobile addictive skinner boxes. Between social media and that garbage a lot of kids are spending their parents money on virtual coins rather than plastic bricks.