Unfortunately, many of you are missing the point. And I apologize to you for not better explaining this issue.
Our culture has changed a great deal since we were kids. When most of us were young you couldn't walk down the street without hearing a model airplane engine in the distance. You couldn't find a magazine rack not filled with magazines filled with "do it yourself" articles. If you wanted to know how to put a plane together ask Dad or the next-door neighbor kid. It was expected that you built balsa and plastic models of airplanes. Airplanes were romantic and exciting. Our adventures in space were real. We were self-reliant or at least attempted to be.
Yes, now days many things are better. Some are not. In any case, things are different. You cannot expect to hand a kid an ARF free flight and expect that it will carry him very far. The modern child lives in a narcissistic nanny-culture that expects to be entertained. Happily, there are exceptions. But, when you hand them a FF ARF, you are reinforcing that culture because what you are doing is fitting in with every norm of the culture: free entertainment with little understanding or personnel investment required, instant gratification with no real achievement.
Contrast that with guiding the child through their first stick and tissue build and then helping them to fly their plane, the plane that they built. And then take the time to do it again on their second plane and their third plane and their fourth plane. You will be amazed to see children who had never built anything before in their life (besides maybe Legoes - which actually are a good thing) build from scratch using techniques such as laminated structures. This is something that far exceeds entertainment. This is now achievement. And achievement trumps entertainment by a long shot. They are on their way to self direction and a focus on accomplishment.
Fooling around with an AMA Alpha, even cooking up pseudo "science experiments" with it, doesn't make it STEM related. STEM has little to do with entertainment and everything to do with achievement.