Space invaders on the EFIS was always good for a few minutes fun.
Rules:
Capt & F/O each select 320 mile scale on map and each select a beacon/wpt/A/F etc on the Fix page which appears on their maps - preferably at opposite ends of the map. Capt gets Fix page 1, F/O gets Fix page 2.
Object of the exercise: Produce a radial from your fix which "wipes out" the other guys fix.
"Hyperspacing" (selecting a fix off the map) is allowed for 30 seconds but must be followed by selection of another "on map" fix. I once got lucky here and manged to zap the other guy from "off map."
Gets a bit boring after 5 minutes but thats another 40 miles closer to the little green doughnut at TOD.