This simple exercise makes people aware of the impact of change and how they feel about it.
Ask the participants to fold their arms. Then ask them to fold their arms the other way round. Wait in silence for a few moments before asking them to unfold their arms.
Debrief by asking: how difficult it was to fold their arms the other way; what it feels like with their arms folded the other way round; and did they have an urge to unfold or re-fold their arms.
Just before they are due to go on a break, ask the participants to put their watches on the other wrist. When they return, debrief by asking: how many people have already returned their watches to the usual wrist; how many times they looked at the wrong wrist during the break; and how it felt having to change the way they wear their watches.