hmm this prompt usually refers to a certain activity or hobby you have. Interesting take on it
The essay sounds just fine, it's only 100 words so i understand it's really hard to stand out in this category.
However there are a few grammatical errors
I love being with or thinking about (unnecessary) my cute 8 month old younger (should be implied considering your applying for college) sister. In the past times, I usually spent most of my time at school, enrolling in many activities, but now I hurry to my home because of that little creature. No matter how stressed, depressed or tired I am, she always makes me feel energized and happy. Day to day, she grows and learns new things. She now (replace with "just" or something like that) learned little tricks(like?) and sheds crocodile tears to get my attention. Her big eyes, scrubby hair, tiny hands, two little teeth and everything is adorable(<-doesn't make sense really, revise) . She always fills me with joy