https://www.youtube.com/watch?v=jfbRrTfMSfc&feature=youtu.be a child presenting Leornardo facts.
https://www.ducksters.com/biography/leonardo_da_vinci.php for information on artist.
https://www.theschoolrun.com/homework-help/leornardo-da-vinci for information.
https://www.teachingpacks.co.uk/guides/leornardo-da-vinci/ has good links to resources on artist.
https://focus.louvre.fr/en/mona-lisa – Not child friendly but watched with an adult you can pick out key parts. Click on tab RHS when painting appears and you can then click on boxes to find out more.
https://www.rct.uk/resources/game-the-dancing-skeleton-childrens-activity looks fun, two other games as well.