Nina looks at different household inventions and finds out how they work. With the help of her trusty neurons she examines the items to answer children's questions Aren't lifts a useful invention? Hoda and Aniya love going up and down in lifts and that's why they ask Nina how lifts work. With the help of lovely Luke, Nina and the girls see inside a working lift, before heading off to a harbour to watch something huge using the same science. This episode explains pulleys, and tune in to find out how to make a lift from a cereal box.