In today's episode, Maddie is looking at the way things are made or trained to help us. First, she meets seven-year-old Anu, who uses a prosthetic leg. Maddie visits a workshop where prosthetic limbs are made and finds out how a computer uses 3D images to make a model, then uses her special camera to see how the images are carved into foam. Next, Maddie meets Nano, a special dog that has been trained to detect nuts and warn his owner who has a nut allergy. We learn how a dog's nose is different from our nose and, using a special camera, we see how Nano makes sure a picnic is safe for his owner.