I'm the 'last of two' as I voted.. but my brother.. the 'first of two' also did FIRST.. but he hasn't for the last couple years (major into it 9-12.. fiddled with it his freshman year of college.. since has not participated)...
just an fyi.. because a true 'study' would have to see what other children may possible be into, have been, or are interested in robotics..
have fun.