Tampons are made of cotton that’s been tightly packed into a cylinder shape. You can insert the tampon into your vagina to absorb the blood that comes out when you have your period. They have a string at the end which stays outside your vagina. When you want to remove the tampon you pull gently on the string. Generally the fuller it is, the easier it will slide out.
Some tampons are just the tampon and string, others come with a cardboard tube around them, called an applicator. They look a lot bigger than the non-applicator types. That’s because the tube is made up of 2 tubes, one smaller than the other. The larger end has the tampon inside and once you have inserted the tube into the opening of your vagina, you push the smaller tube inside the larger one and that pushes the tampon up into your vagina.