system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] I have a Muggle sibling I would like to join me on a magical quest. I'd like to put a kit together for them to use and since they can't use magic directly can anyone suggest magical items I can include that they could use indirectly?
gpt
Muggles can make use of potions, as well as artifacts which don't require magical activation. This means he could use a poet key (for example) as they only require being touched while a preset condition (like a time or word) is met, but not a broomstick.

I suggest having him carry medical potions as well as incendiaries and other utility potions in an expanded bag. You could also include items from the WWW, like canary creams (eat it, fly somewhere, change back) and instant darkness powder. Definitely get him a Shield Hat.