How would you handle

There is a middle-schooler in my "neighborhood" (he lives 6 blocks away!) that has some form of mental disability. He learned last summer that me and my neighbor like to be out working on our cars. It got to the point where I got bicycle noise PTSD, everytime I heard a bike I would run inside whether it was him or not! All he would do is ask "what's that" and "why" and he wanted to start wrenching and wanted to touch everything. I started working with doors closed and found a way to park my cars in the driveway where you couldn't see if I was in the garage or not. Eventually he stopped looking for me. I'm not a very confrontational person, so I can understand if you didn't want to be blunt with him. You might have to Isolate yourself for a while. Stay on your toes!