Okay kiddo, so you know how sometimes things can go really well, but then they start to get worse and worse until they're not good at all anymore? That's kinda like a culminating point!
A culminating point is the point where something has been going really well, but then it starts to go downhill fast. It's like when you're playing a game and you're doing really well, but then you start making mistakes and everything starts falling apart.
For example, let's say you have a really great day at school. You get an A on your test, your friends are nice to you, and you have a fun game of tag at recess. But then, on your way home, you drop your favorite toy and it breaks. That's the culminating point - the point where everything was going well, but then something bad happened and it all fell apart.
Culminating points can happen in all kinds of situations, like in sports, in business, and in life in general. It's important to try to avoid them if you can, but sometimes they're just a part of life.