My brother took his ten speed bike completely apart when he was a kid. It had to go to the back shop. He grew up to be an engineer.
Some how this helped me to be understanding when my son went thru his take the pens apart stage. Usually, I would look for a pen in the draw and find lots of parts.
We have had so many stages. My son hopped on one foot for a year frequently. It drove me crazy. I should make a list one day of all his unusual habits. When he was a toddler he collected dust bunnies and little threads.
my suggestion is to put all the good pens away until this passes. One day when he is making strange sounds all day long you'll wish he was still taking apart pens. Your lucky he is putting most of them back together. LOL