We were given a whole, fresh pineapple as a thank you, for some work my daughters and I helped with a week ago. Fresh pineapple is pretty rare for us, so we made the absolute most of the one we received.
The core of the pineapple is less flavorful, and more fibrous than the outer flesh of the fruit. Often the core is just disposed of.
I added the core pieces to a pitcher of filtered water and left in the fridge for a couple of days. This pleasantly flavored our drinking water for a couple of days.
I also cut the crown off and have it sitting in a saucer of water. I have a hunch that you need more of the pineapple corwn than I allowed. But if it does grow in to a house plant, that will be fun.
You know, I considered trying to use the skins of the pineapple. Some people juice the skins and all. But our pineapple was looking a little less than fresh, so I composted those skins. Still, the compost will make a free soil amendment in a few months, so I guess I didn't let any of it go to waste.