This image shows how art is used to communicate and understand information.
For more bite-size art learning and teaching for your child, try the link below.
https://www.accessart.org.uk/pedagogy-in-250-words/
https://www.tate.org.uk/kids/games-quizzes/art-parts
I found this, thought it would great to step into how does one finish the painting using human creativity using digital tools.
In general, there are many quiz, art making and games to play on through this site.
If you wish to learn further on about the elements of art,this link helps explain more in depth and the purpose of each element Lillian Gray Art School blog.