One of my favorite things to do with apples is make applesauce. When the kids are left loose in the house with whole apples, we end up with a lot of waste, since the kids will raid the fridge for them when I'm not looking and I'll find nasty old partially eaten apples all over the house every time I clean. With applesauce, they usually need help to get it, so there is more portion control and a lot less waste. Plus it is tasty as heck! It's also surprising easy to make.
Peel (some recipes say the peeling is optional, but my children tell me it is not) and core apples. Cut into slices or chunks. Put in a large pot with a little water, about 1 1/2 cups per 5 pounds of apples. Cook until tender. Mash with a potato masher until desired consistency. Stir in cinnamon to taste. Ladle hot applesauce into hot jars, leaving 1/2-inch headspace (do NOT overfill. Cleaning the canner after a jar's top pops off is no fun). Adjust 2 piece caps and process in water bath canner for 20 minutes. May also be frozen, if preferred.