This Google Doc compiles a long list of authors sharing virtual read alouds.
Ranger Rick has made their website and all current digital editions of their magazine free until the end of June.
The Library of Congress is hosting drawing classes from Dav Pilkey, creator of Captain Underpants.
Neil Gaiman has material available for adults and children on his websites.
LeVar Burton will be reading aloud on Mondays at 12pm for children, Wednesdays at 3pm for young adults, and Fridays at 9pm on his Twitter feed. He also has a collection of stories recorded through his podcast, LeVar Burton Reads.