I’ve been enjoying the Introduction to Mathematical Thinking course by Keith Devlin. For the first few weeks, we mostly talked about language, especially the language of logical thinking. This week, we started working on proofs.
For a bit of fun, the professor emailed a link to this video. My daughter Kitten enjoyed it, and I hope you do, too.
Denise Gaskins' Let's Play Math 
We are watching this in my next geometry class! I love it and thank you for sharing.
You’re welcome, Angela. I hope your students are inspired to write some great proofs!