16 year old kid thinks he's figured out gravity: the least understood of the four forces. Jeez, give me a break, and before that give him an advanced multi-variable calculus textbook along with differential geometry so that he can actually comprehend General Relativity before pointing flaws in it. That should keep him busy for a couple of years.
Why would I want to spend my money in order to pay airfare for some high school kid's very expensive NASA field trip?