In the video game "Skyrim" you can experiment with ingredients for potion making (by eating them or mixing them). I only rarely did this and downloaded a list of potion recipes from the internet. That was because in experimenting I lost a lot of ingredients, and it was not worth it, especially for the more precious ones. As for your game, as we don't know what other mechanics/story you have implemented, other than potion making, it's hard to say if it will be fun.