I found this website which shows the descriptions of scientists, by a group of 11 year olds before and after visiting Fermilab, one of the top particle physics facilities in the US. The difference in perception is quite interesting...

I particularly liked this girl's description AFTER visiting the lab:

Before:

You can see them as a mad scientist with hair standing straight up and a mean wicked laugh. . . . I see them with rubber gloves and safety goggles on. I see them in a chemistry lab surrounded by beakers, graduated cylinders and tables filled with experimental materials.

After:

Scientists love their jobs. They wake up in the morning and are excited to come to work. . . . When you are a scientist, you come to work ready to explore and learn new things. Things that may change the world someday. Maybe not today, maybe not tomorrow.