I'm sorry your child is sick right now, hopefully it's not serious and he'll get better soon. As for a fairy tale, you can come up with an interesting short and interesting stories about the magician your son will turn out to be, without much effort or strain of imagination, with this tool in a few minutes https://talesparkle.com/.

I want to make up a fairy tale with my child in the main role. Now he is lying in a hospital bed, and I try my best to entertain him and distract him from bad thoughts. He loves stories about wizards and dragons, and I decided that by all means I should invent a fairy tale for him, where he will be in the role of a good wizard. But it hasn't been that easy. I don't have enough imagination to come up with something really interesting. Who can help me with that?