A nonprofit is raising funds to construct a playground in Medford honoring Krystle Campbell, the Medford High School graduate who died in the 2013 Boston Marathon bombings. With support from the city, the Where Angels Play Foundation plans to fund and build the playground with help from community volunteers. Working with Mayor Stephanie M. Burke and the Campbell family, the city chose Logan Park as the location for the playground, which is expected to be built this fall. Created in 2012 by retired New Jersey firefighter, the foundation built 26 playgrounds in East Coast communities devastated by Hurricane Sandy to honor the 26 teachers and students killed in 2012 at the Sandy Hook Elementary School in Newtown, Conn. Medford previously created the Krystle Campbell Peace Garden, a memorial in Medford Square to the victims, survivors, and first responders of the Marathon bombings. For more information on the playground project, e-mail MaryKate Herbert at firstname.lastname@example.org.John Laidler can be reached at email@example.com.