Glass Mason jars are perhaps the ultimate upcycling ingredient of all time. They come in all shapes, sizes, and even in a variety of colors. Mason jars can be used to give wonderful homemade edible gifts, as well all know, but after the eating’s done, jars like this can take on a whole new life. We’ve rounded up some of our favorite kid-friendly Mason jar projects, perfect for whiling away a rainy afternoon or hiding out from the summer heat. Whether your kiddos have a green thumb or want to capture rainbows in their jars, we’ve got a craft (or two!) to suit everyone’s tasteā€”even the adults in the house. Check out what you can do with an old Mason jar and supplies you probably already have around the house!