Having witnessed the F.I.R.S.T. competions first-hand (sorry!), and as a mentor to Team 293 SPIKE, I would hands-down go with National Instruments. Their contributions to the electronic control and interface features on the robot challenges let high school students (and even some 8th-graders) gain the satisfaction, experience, and fun of creating a robot that they can control and be proud of.
NI has also been involved with LEGO competitions, to the point where students use LabVIEW-based software to control robots. I recall an exhibit severalyears ago at the Boston Museum of Science on Lego Mindstorms.
If you are interested in FIRST robotics, here is a story on EDN that talks about this year's FRC competition, where competitors have to complete their robot in a short time window. And, here's another story (shameless plug) that profiles the team my daughter competes with in FIRST Robotics FTC competition.