The Homesteader Festival crew have created free workshop series called Rooted Online that teaches everything from seed starting to yogurt making: https://www.homesteaderfest.ca/rootedonline
This Canadian site FarmFood 360 offers 11 Virtual Tours of farms from minks, pigs, and cows, to apples and eggs. https://www.farmfood360.ca/
Farmer’s almanac for kids… Date, weather, moon phase, etc. https://www.almanac.com/kids
Guide to gardening for kids https://web.extension.illinois.edu/firstgarden/
Agriculture in the Classroom has some great free resources should you have kids at home and are in search of some activities.