Knowledge: Ice hockey was invented a long time ago so it is not that dangerous a sport and safety gear to wear are gloves, neck protector, face shield and mouth piece. On the other hand, kayaking requires to put life vest in case of emergency.

Conversation:
My dad wants to go kayaking but I don't now anything about it.
Well, kayaks are canoe-like and sit low in the water. You sit in them with your legs out front and use a double-ended paddle to move. Does that help?
Yeah, I have heard that it is kinda dangerous.
I don't know about the danger, but did you know that kayaks were invented by the Inuit millennia ago?
Nope, I did not know that. I guess it's not that dangerous since it was invented a long time ago. But do you know any safety gears I should wear?

Response: Oh yeah, a life vest is the only safety gear to wear while kayaking.