The MEAS Vibration sensor is flexible and durable.
This Piezo Film Vibra Tab Mass model LTD0 by Measurement Specialties is usable as a vibration sensor, flexible switch or frequency response device. Nice and flexible, it holds up well to man-handling.
We've seen these used as "virtual hair" on LARGE robot (ok, it's an electronic giraffe) where a strip of these act as a nice surface for kids to "pat" the robot".
Features: Key Specifications: Example Applications: