Caribu is Free to get started! Caribu Free gives you access to 15 books/activities per calendar month. Everyone that creates an account in Caribu will get 15 books/activities per calendar month. The books/activities reset at the beginning of each month.
If you're on a Caribu call with someone and read a book together, that will count as one book for each of you. If you open the book to the preview page, you can read the description of the book without it counting. If you click the "read by myself" to read the book or if you read a book while on a call with someone, that will count as a book. If you want unlimited books and activities with your friends and family, you can upgrade to Caribu Unlimited at any time!