Plaça Pompeu Fabra
A playground located right across from the Hotel Seasun Far in Plaça Pompeu Fabra, which has a very small public parking lot. Parking next to the playground is also not really an option, you'll need to find parking on the streets around the area or drive down to the public parking lot of the Alcanada beach.
The playground is fenced in in most areas, however opens up to the natural park behind it (Parc públic Paco Alcanada). The activities are great for younger children and school children. You'll find a few restaurants in the area as well.