They were tinkerers, though.  You&#x27;ve got the MIT model railroad kids, all the people that fooled around with scrap electronics, the radioheads, some gearheads.<p>I have no references to back this up, but I think it would make an interesting longitudinal study, or if you were somewhat cruel, a twin study: are children that spend most of their play time building with Legos or Kinex or erector sets significantly more likely to end up as engineers and computer programmers?