One recommendation I have for learning about different mediums is a great website called Artist Daily. It provides lots of great information and they have some very helpful free resources there to use for your budding artists at home.
It is free to subscribe so you can enjoy looking around at all the resources and freebies they provide. I highly recommend you checking this site out as a resource for your art learning at home ~
*one more quick resource to share- Famous Artists from the Practical Pages Blog.
Until Next Time !