WHYY By Preschoolers in Rwanda look at the books created for them by String Theory School students in Philadelphia. (Provided by String Theory Schools) About 1,000 preschool children in more than a dozen schools in Rwanda have each received a picture book designed by a group of high school students in Philadelphia. At String Theory charter’s Philadelphia Performing Arts school, 21 teenagers ranging from grades 9 – 12, created “Baskets of Fun, Under the Sun” with Books and Beyond USA, an initiative to produce books for young readers in Rwanda. According to BBUSA, Rwanda has few books f...