"Amazon Pay" is a way to buy things online from websites that accept it. It's like a piggy bank! You can add money to your Amazon Pay account, and when you want to buy something, you can use the money in your Amazon Pay piggy bank to pay for it.
Let's say you want to buy a new toy from a website that accepts Amazon Pay. You click on the "Amazon Pay" button and sign in to your Amazon account. Then you can choose to pay with the money in your Amazon Pay piggy bank, instead of using your mom or dad's credit card.
Amazon Pay is safe and secure because it's run by Amazon, which is a big, trusted company. So you don't have to worry about someone stealing your money or your information.
Overall, Amazon Pay is just a super easy way to buy things online using the money you already have in your Amazon account.