I think you completely missed the point. Lego isn’t just for kids. There is a whole creative community of AFOLs (adult fans of Lego) and are now sets aged 18+. Additionally retired sets increase in value of 11% each year, arguably better returns than stocks, shares or wineI used to be into legos when I was a kid, but now that I am an adult, I have put away childish things ;-)

Maybe you’ll go back to it when responsibilities of work, home and bills get too boring.