What could be the plot of a 'feelin good feelin fine' short story?

Sure. Once upon a time, there was a little girl. She woke up one sunny morning and as she opened her window, a gentle breeze blew in. The birds were singing merrily outside. She immediately felt 'feelin good feelin fine'. She put on her favorite dress and went out to play in the garden. She chased butterflies and smelled the flowers, and that day was filled with simple joys.

I'm not sure specifically what the 'feelin good story' is without more context. It could be a story about someone achieving a personal goal and feeling great, like a person who finally ran a marathon and was overjoyed at their accomplishment.

I'm not privy to the 'feelin good story' itself. However, it could be about a student who was struggling in school but then found a great teacher who inspired them. They start to excel in their studies and gain confidence. This transformation would be a wonderful part of a 'feelin good story' as the student would be feeling good about themselves and their future.

Since I don't have more details about this 'robert keen feelin good again story', it's hard to say exactly what it entails. However, generally, for someone to start feeling good again, they often need to make changes in their lifestyle, mindset, or environment. Robert Keen might have started taking better care of his physical health, like exercising regularly and eating well. He could also have worked on his mental health by practicing mindfulness or seeing a therapist. And perhaps new opportunities or relationships came into his life that brought him joy and made him feel good again.

I don't have enough information to accurately tell the main plot. It could be about Robert Keen achieving a personal goal and that leading to him feeling good again.

A student discovers a hidden talent. For example, a girl who thought she was only good at academics finds out she has an amazing singing voice during a school talent show rehearsal.

For a 'first kill' short story, consider a story about a werewolf. A young man discovers he is a werewolf one full moon. His first kill is an accidental one. He was out in the woods, unable to control his new form. He attacks a deer. When he wakes up the next morning, he is horrified by what he has done. The rest of the story could be about him learning to control his werewolf side and coming to terms with his first kill.

The plot could be about a person who goes on a hike on a fine day. They discover a hidden waterfall and are amazed by its beauty.

A lot of things! Maybe a character has a deep conversation with a friend while looking out the window. Or they could have an unexpected encounter that changes their life.

For a 7th grade short halloween story, here's an idea. A girl is getting ready for Halloween. She's wearing a beautiful princess costume. But when she looks in the mirror, she sees a different reflection. It's a spooky witch. The witch takes over her body and goes out to cause mischief. The girl's friends notice something is wrong and try to find a way to break the spell. They go to a local wise old woman who gives them a special potion. They manage to get the witch to drink it and the girl is back to normal just in time for the Halloween party.