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. Jordan, Jaymee and Honor ask: How can an X-ray take a picture of my bones? And It is a very good question that Nina can't wait to answer. With help from lovely Luke, the sight neuron, Nina shows the three friends a real x-ray machine in her workshop before packing her bag and taking them somewhere to see another one in action. In this amazing episode we learn all about x-rays and make our very own x-ray machine using a torch.