An apple corer is a tool you can use to easily take out the middle part of an apple. It's like a special knife that is shaped like a tube with a sharp point on one end and a handle on the other end.
When you want to use an apple corer, you first need to pick an apple and wash it. Then you hold the apple firmly in one hand and use your other hand to push the sharp point of the corer into the top of the apple, where the stem is. You need to push the corer all the way down until it reaches the bottom of the apple.
Next, you twist the corer back and forth gently to loosen up the middle part of the apple. This part is called the core and it includes the seeds and woody bits that you probably don't want to eat. Once the corer has made a hole all the way through the apple, you pull it straight up and out of the apple.
Now you can see that the middle part of the apple is missing and you have a hole going all the way through it. If you want, you can cut the apple into slices or chunks to use in a recipe or to eat as a snack. You can also use a special peeler to take off the skin from the apple, or you can just leave it on if you like the taste and texture.
Overall, an apple corer makes it really easy to remove the core from an apple and enjoy the rest of the fruit without any fuss or mess. It's a handy tool that can save you time and effort in the kitchen.