Each year Google holds a Doodle 4 Google competition for kids in grades K-12. For its 7th year, the competition revolved around the theme of an invention that would make the world a better place, and 11 year-old Audrey Zhang of New York was the big winner with her transformative water purifier doodle. Zhang’s win was no small feat considering Google received more than 100,000 submissions with 250 state finalists, 50 state winners, and 5 national age group winners. Of her winning artwork, Zhang says, “”To make the world a better place, I invented a transformative water purifier. It takes in dirty and polluted water from rivers, lakes, and even oceans, then massively transforms the water into clean, safe and sanitary water, when humans and animals drink this water, they will live a healthier life.”

Zhang’s artwork scored her a $30,000 college scholarship and $50,000 Google for Education technology grant for her school — and because Google was extra inspired by her doodle invention, they donated $20,000 in Zhang’s name to charity:water to help provide clean water to schools in Bangladesh. Additionally, because Zhang’s drawing had so many delightful elements, Google invited Zhang to spend a day with professional doodlers to turn her illustration into moving animation. Zhang was the big winner, but many other youth submitted amazing drawings as well. You can take a look at the outstanding national grade group winners here.

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Images via Google