Re-grow vegetables from your kitchen scraps:
https://www.whatdowedoallday.com/plant-science-regrowing-vegetables-from-scraps
Make Ice Cream in a bag:
https://www.delish.com/cooking/recipe-ideas/recipes/a54721/ice-cream-in-a-bag-recipe/
Make Maple Syrup Snow Candy:
https://littlebinsforlittlehands.com/maple-syrup-snow-candy/
Make an ice table centre-piece/candle-holder:
https://www.instructables.com/id/Ice-Luminaries/
Try some of these Winter Science Activities:
https://littlebinsforlittlehands.com/winter-nature-ice-melt-science-activity/
Make a Bird-feeder and see what
birds come around this season:
You can get free Bird-ID e-books from Nature Canada here:
https://www.allaboutbirds.org/news/ has a free Bird-ID tool –answer questions about your bird sighting, and it will bring up pictures of possible birds – you can listen to their calls, and learn more about each bird.