Prime members can get a three-month family plan subscription to Amazon's kid-friendly content service, FreeTime Unlimited for total of $2.99, through 8/1. After the first three months, the plan is $6.99 per month for members and you can cancel at anytime. This offer saves Prime members around $18. It's available to new FreeTime subscribers only, and the family plan supports up to four users. This service delivers kid-friendly books, movies, TV shows, educational apps, and games on Fire, Android, iOS and Kindle devices. Sales tax is charged in most states.