Child suicide is a real thing. Isolation, depression, abuse, etc, are all reasons for suicide, and what people don't understand is that children feel the same way as an adult, they just don't handle their emotion as well. I should know, I try to kill myself when I was eight. I was a lonely, too intelligent, sexually abused, anti-social, bookworm, "nerd-ish" (with my peers), "stupid" (with my cousins), out-casted/ignored little girl.
Because I couldn't handle being ignored by everyone, (yes, my parents ignored me, but not by choice. I knew they loved me, they still do, but I rarely saw my dad because of his job, and my mom was always busy doing something.) which included my sister, cousins, and anyone in my age group, and being abused by someone I thought I trusted, I was going to "sleep forever." I was going to take a load of sleeping pills (my mom's an insomniac. So am I), but fate has it that the day I was going to kill myself was the day my abuser stopped and my mom ran out of pills. Not sure what to do, I failed in my plans, and so far, I've been thoroughly enjoying life.
So, yes, child suicide is possible. It's always been possible, and will always be possible as long as children are abused, hurt, or just put through too much stress or emotion overload. That's why parents must love their children, nurture them, but also discipline them with a gentle, but stern hand. Condolence to the parents. No one should be put through that sort of pain and grief.