Accepting a job with a start-up?

Our son distilled his 10 week summer internship offers down to two. One with a well established company (in the top 50 of Fortune 100) where he would net $13k. The other offer was from a silicon valley stealth-startup where he would barely break even. The choice for him was easy - he took the startup. I like his evaluation of the startup as a place where he would learn so much more than at the established company. Our advise to our son has always been that taking risks is easier done early in one’s career - the upside possibilities for both learning and money are great.