I use to make rubber band guns in wood shop during middle school.
A lot of people did 40 years ago. It was probably part of the standard curriculum.
Some people never stopped making them. Some became artists while making them!
I swear if you did that these days, in middle school, someone would call SWAT. Helicopter moms would cry. The kid's home would be inspected by Child Protective Services, and the obviously disturbed youth would be forced into counseling.
--My elementary school has a rifle range in the basement under the gym. Sigh...