We need to know more than just "it's a child that makes people cry themselves to death." What story are you going to tell - How The Foundation found it, Who or what created it and why, did someone use it to some end? (These are not all questions that must be answered, these are some possible narrative hooks.)
I also recommend reading several (at least 10-20) of the top-rated SCPs from the last several months, and avoid reading series 1 SCPs for inspiration. Many series 1 SCPs would not last a day under current SCP standards, and a few are only still around because of their history with the wiki itself. (This does not apply to all series 1 SCPs, as you can see I mentioned 093 earlier, but many of these were written before the wiki's style had really been cemented.)
I also agree with F15H35's comment that Depression and other neurodiverse traits are a touchy topic for many, and unless you suffer from it yourself or are willing to do a lot of research to avoid offending people, I would not recommend writing about it.
The anomalous entity, while important, is not actually the main focus of the SCP. A good story, a compelling narrative, something that makes the reader feel something - that is the goal of an SCP article. What feeling do you want to evoke from the reader? Horror? Empathy? Sadness? You need to create a narrative around this object and its effects.
I am not saying this to discourage you, I just want you to understand the amount of effort that goes into creating a successful SCP.
If you can revise this idea with a story that you want to tell, we will be able to give you much more meaningful and constructive critique.
