I can see this being a good idea in general. However, if I wanted to do it in one class, they would then maybe like to do it for all classes in the school. This would snowball into all schools. At that point, the police department's school liason officer would be asked to weigh in. Just guessing here.
I guess the flip side to that is to buy and bring in the materials for one class, and handle it directly with the teacher. If that works, then take it to the next levels. I did an Eddie Eagle thing many years ago at a "Public Safety Day". Subsequent years, they had the prison system people do the same program with "Doc Owl" or something similar.