I always thought the 4.56 acre Roger Williams National Memorial was the smallest of the 411 properties maintained by the National Park Service, but it’s not! That honor actually goes to the 18th century Philadelphia home of Polish war hero Thaddeus Kosciuszko. The National Park Service turns 100 this year, and Manton Avenue Project is celebrating with ten short plays written by Olneyville third and fourth graders, each set in a different national park. In Manton Avenue Project tradition, all of the roles will be performed by adult actors. There’s a talkback after the show, too.