I find that most younger kids associate GSD's with the police and as police dogs. I also find that unless they get to know them, some are afraid of them because they are "police dogs", even if they are not. My own nieces and nephews thought this way, that of course has changed, but those were there thoughts.
Misty- Samoyed Mix, Tannor- Golden Retriever CGC
Robyn- GSD CGC, TC, Midnite-GSD CGC,TC, Brennan-Golden Retriever CGC, Batman-Husky/Greyhound , Apollo-GSD