Making credible sources fun
Every Monday at 3:30, I present a live news quiz for kids via Zoom and Facebook Live, on Enoch Pratt Free Library's Facebook page. My last slide of every quiz is a list of sources and a quick sentence: "We get our information from authoritative sources like [NOAA, Smithsonian Magazine, US Bureau of Labor Statistics, AP, Baltimore Sun, etc] and we recommend that you do too."
I often use 'fake news' answers as options in my multiple choice questions, so that I can debunk them and explain why they shouldn't be trusted.
Once every 6 months or so I do a quiz entirely devoted to news stories that are exaggerated or outright untrue. I explain that trust in news sources is like trust in people - if they are recommended by a person you trust, you can start from a position of trust. If they are casual acquaintances, you should check around with people you do trust until you repeat what they aver to be true.
I started doing the news quiz online in April or May of 2020, having made a paper Tuesday Newsday quiz as a handout at my library for a couple of years. When kids turned in their Tuesday Newsday quiz (they got a sticker whether they answered the questions right or not) we took the opportunity to chat about the stories and their sources.
We used to put a Spot the Fake News bonus question on the paper quiz - and that was the one they got wrong most frequently. This informed our choices in news quiz questions and in other programming.