Nina investigates how cranes work - with the help of Luke, her sight neuron. Engineers Blossom and Kah Weng visit Nina in her workshop and discover that cranes can lift really heavy things, but they need to be balanced so they don't fall over. Next, they visit the Titan Crane in Glasgow to see a big crane up close.

Originally released by BBC Worldwide Learning, 2013. Streaming video file encoded with permission for digital streaming by Infobase on April 29, 2015.