The Fort Pitt Museum and program partner Point State Park are teaming up to provide children and their families a chance to try various 18th century toys and games. In addition, to help celebrate Pittsburgh's bicentennial, visitors to the booth will be able to make their own 19th century toy - a thaumatrope. Invented in 1825, a thaumatrope is an optical toy that consists of a disk with a picture on each side attached to two pieces of string. When the strings are twirled quickly between the fingers the two pictures appear to blend into one due to the persistence of vision. Disk options will include a traditional bird cage and cardinal plus additional choices related to Pittsburgh's history.