Artist / illustrators hosting online content
Lots of artists and children's illustrators are hosting live art sessions, or putting up videos.
Rob Biddulph - the world book day illustrator http://www.robbiddulph.com/draw-with-rob
Mo Willems (author of 'Don't let the pigeon drive the bus) https://www.kennedy-center.org/education/mo-willems
Scottish Book trust - library of lots of authors and illustrators https://www.scottishbooktrust.com/authors-live-on-demand
Virtual museums and tours
Many museums and art galleries are doing virtual tours of their galleries while they are closed.