Bookshelf but I changed literally one pixel and you probbably won't ever see it unless you really tried and even then it won't be that impressive

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Tynker is the world’s leading K-12 creative coding platform, enabling students of all ages to learn to code at home, school, and on the go. Tynker’s highly successful coding curriculum has been used by one in three U.S. K-8 schools, 150,000 schools globally, and over 100 million kids across 150 countries.