Science Museum, London, United Kingdom
The "energy ring". The white blocks which can be seen on the underside of the beam connected to the top of the ring can move (the whole inside of the ring is essentially a giant led display), and are "injected" into the ring where they spin around and illustrate the transfer of energy.
The nozzles of a Black Arrow[b] rocket.
Wall covering display seen at the far end of the museum.
