Xindao stand, PSI. Xindao sells measuring devices. A visitor is invited to make the dummy travel along the top of the stand, max. 8 m. The dummy unrolls a tape measure while doing so. The visitor is invited to guess the distance. The dummy has a on board TV camera and transmitter, A cover is pneumatically raised from a monitor and if the answer is, near.., right, the visitor gains a premium.