My son made a lego vacuum supercharger that reaches 29000rpm

He is 14 and wishes to become a mechanical engineer. He has built a lego vacuum engine and spends every day changing 'something'! He was very excited to tell me. After some googling, I think he may have beaten some kind of record? There is a video on YT with more info; https://youtu.be/17Ih307\_zOY?is=b2Q3tIaVN5TtiVqH I posted on r/MechanicalEngineering a few days ago asking for advice about what I can do for him. The advice over there was fantastic. Unfortunately, lego-wise, there are no...