This was over ten years ago that I read this poem in a random library book while looking for my next novel to enjoy, so I may have some of the details remembered slightly off or skewed...
It's a short story, about an alien child's science project, creating Earth, that the child keeps going for longer than he was supposed to, and ultimately regrets having to eliminate it.
The child ends up creating life, and describing it in journal entries, and as it turns out, it's a planet. The planet evolves at an exceptional rate, with life evolving into what is vaguely described as a planet resembling what I assumed was Earth or an analogous representation.
Fighting, war, and destruction are witnessed of this science project and the adults referenced in the story insist the project be broken down and scrapped as it's no longer a beautiful project, but more of a nuisance.
In the final entry the child describes regret for having to end the project, as it is in fact alive, however he also expresses his hopes that the living organisms understand that he doesn't want to do what the adults are making him do, but no one seems to have another way to go about it, what with all the trouble the project is causing with its expedited advancement and overall self-destructive nature.