It doesn't work for me, I do have ADD and lego puts me into flow, but after that I kust feel bad that I spent time and money on something without actual value.
Thinking I could have spend that time on chores, home improvement or side projects...
But what do you mean without value you said it makes you feel good that's the best value ever.
Money is not like time - if you don't spend money you get to keep it. If you don't spend time, you waste it. You can't do chores all the time so instead of just doing nothing why not doing something that makes you feel good just for the sake of it