From their event page: 

Celebrate spring by joining Fairmount Park Conservancy and children’s music performers Two of a Kind for a concert at FDR Park’s new Anna C. Verna Playground on Saturday, April 20 from 9:30–11:30 AM.

Two of a Kind is David and Jenny Heitler-Klevans, an award-winning musical duo specializing in interactive music for children and families. Two of a Kind gets audiences of all ages involved in the show, through singing, movement, sign language, lyrics-on-the-spot, puppets, and more. They have released 10 CDs and one DVD, garnering over 20 national awards.

Two of a Kind will play two 45-minute sets (schedule below) underneath the playground’s pavilion. Enjoy a music-filled morning along with kid-friendly giveaways and free water ice (while supplies last) from Dre’s Water Ice.

Families are encouraged to bring lawn chairs and/or blankets. Registration is appreciated but not required. All ages are welcome. Children must be accompanied by an adult.