Philadelphia and the State of Pennsylvania:: Cool Stuff Every Kid Should Know (Arcadia Kids)

DO YOU KNOW WHAT big celebration drew nine million people to Philadelphia--in 1875?(Hint: It was another "Philly first.")WHICH invention dedicated in 1946 at the University of Pennsylvania greatly contributed to the birth of the Information Age?(Hint: The "baby" weighed 30 tons!)Find these answers and more in Cool Stuff Every Kid Should Know
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