Headphones are something you wear on your ears that let you listen to sound or music, and people around you cannot hear what you are listening to.
Headphones come in all shapes and sizes, from large ones like in the picture through to tiny earbuds you can barely see.
A mask is something you put over your face. Some masks are used by doctors so they do not breathe on you in a hospital. But many masks are pretend faces that are fun to wear, and make you look like a monster or an alien or just a different person.
A tie is a piece of fabric that professional men wear around their neck. Ties come in an enormous variety of colours and patterns, and are tied in a special knot.