Hall Pass - Print on card stock and put into ID badge holders on coil key chains (both from Walmart). Blank pass at end can be written on with a whiteboard marker and then erased (for students who have to go somewhere else in the building). These are waterproof (seal the top opening with packing tape or buy self-seal ID badge holders) and kids wear them high up on their arms so they don't get wet/dirty in the bathroom.
'I quickly flip these over and record the directions. Then if the students get to the station, but forget the task, they can press the button and hear them again!' - these could be cool for listening station activities too!