Museums and galleries
Fitzwilliam Museum - a series of activities based on museum objects that encourage children and families to look, think and be creative together. They plan to launch new objects every week
https://www.facebook.com/fitzeducation
https://twitter.com/FitzMuseumEduca
Gallery and museum virtual tours - https://www.familydaystriedandtested.com/free-virtual-tours-of-world-museums-educational-sites-galleries-for-children/