Okay, so imagine you have a coloring book with lots of pages. Coating and printing are like two ways of coloring the pages so that they look really nice.
Coating is when you put a special layer of paint or varnish over the page to make it shiny, smooth, and protect it from getting dirty or torn. It's like when you put clear nail polish on your nails to make them shiny and strong. Sometimes you use a special machine to put the coating on, and sometimes you use a brush or roller.
Printing is when you put pictures or text onto the page using ink. It's like when you draw a picture or write a message with a pen or marker. But printing is a special way of making lots of identical copies of the same picture or message, quickly and accurately. You use a special machine called a printer that puts the ink onto the paper in the right places. There are many different types of printers, like inkjet printers, laser printers, and screen printers.
Coating and printing can be used together to make really cool things like magazines, books, posters, and even packaging for things you buy at the store. The coating can make the colors look brighter and the printing can make the pictures and words stand out.