Any good beginner ideas for teaching?

[LoveLaika]

I'm planning to teach some rather bare-bones basics of FPGAs to some people, and I was wondering what kind of interactive projects can be good to show off the capabilities of FPGAs in general (using a Basys 3 board)? The crowd I'm teaching to has some basic knowledge about electronics, but they know nothing about FPGAs, and this session is probably for an hour or so, so nothing really long term. Just something that would help them get their feet wet into FPGAs. It's been a while since I worked with FPGAs, and I can't really think about anything that would make me think "wow...what else can I do with FPGAs". Any ideas?

I was also thinking...maybe for a show-off project that would show off the power of an FPGA, something like a pre-made project like Pong or Nand2Tetris may be good, but nothing that the students would program. I thought it would be cool for them to see some big project that can be done with an FPGA, but that might be too troublesome in its own right.

[cfbsoftware]

Check out some of the ideas on FPGA for Fun:

https://www.fpga4fun.com/