Reading is fundamental. Not only is that true, it's the name of the nonprofit that is giving away 50 free ebooks to all families.
The books are digitally mastered in HD and available in both English and Spanish. To get them, you'll need to create an account at Billion eBook Gift and then either use the ustyme app on Android or iOS or read them from ustyme's web site. (Ustyme is a free app platform that distributes family content including books and games. It also has a Facetime-like live video feature, so you can read with your kids from afar.)
It's a nice collection of short, well-illustrated stories including classics like The Three Billy Goats Gruff, There Was an Old Lady Who Swallowed a Fly and The Tortoise and the Hare.