Ideas for Espruino presentation?

Some stuff that comes to mind...

• Some kind of multiplayer game?
  
• A poll/quiz? You could hand out 9 of them and everyone selects an answer, then the other one shows how many of each answer there were?
  
• You could shove a relay shield on the back of each one and make each one control a small robot
  
• You could stick a Wifi shield onto the back of one, and have it grab data that it sends to all the others (for instance using them as now/next occupancy labels for rooms, or price tags).
  
• Same thing but use GSM and do it with cellular data or SMS (SMS is super easy http://www.espruino.com/Pixl.js+SMS+Remo­te+Monitoring)
  
• You could just do the same but with Node.js on your laptop or a Raspberry Pi to grab the data off the net and put it on Bluetooth.
  
• You could put a bunch of Bluetooth Espruino boards (or just beacons) around and have the Pixl display a map that showed where you are based on which beacon had the strongest signal