What CCNA1 labs have you encountered so far?

Hello,

I'm curious: what CCNA1 labs have you encountered so far? At CCNA1 I played with:
- wireshark for packet capture
- cain for interesting demonstrations
- packet tracer for simulating networks
- let's not forget the subnetting labs and wiring cables
- another "lab" is playing a game like "Jeopardy" with questions from the it section

What other interesting activities have you done so far on your CCNA1 classes? I'm looking for ideas to spice a little my CCNA1 class, so any crazy idea is very welcomed!

Thanks in advance!