Question: kid friendly things to do in san juan puerto rico?
Answer: El Morro Castle's lawn. In front of the historic El Morro Castle there is a large lawn that is part of the beautiful scenery, and that visitors can enjoy through a variety of activities. ... 
Beach trip. ... 
Paseo de la Princesa playground. ... 
Bicycle ride. ... 
Feed the pigeons. ... 
Parque Central. ... 
Bahía Urbana. ... 
The Wildlife Museum.