If you have Amazon Prime, you also get access to discounted Amazon Kids Plus. The subscription service features a range of ad-free content, including books, games and videos for children ages 3 to 12. Parents can limit the amount of screen time available to their children and manage up to four profiles on iOS and Android.

Amazon Prime memberships costs $14.99 monthly or $139 annually. There is a certain number of orders you'll have to make, on average, to make the price worth it.

Prime members can earn unlimited cash rewards at Amazon, plus get an instant gift card with the Prime Visa. Here's why it adds up fast.