Bougainville Park is a tranquil, tropical oasis in the middle of the Papeete's concrete jungle. Stretching from Boulevard Pomare to Rue du General de Gaulle, it makes for a lush and cool picnic (or roulettes take-away) spot. If you're traveling with the kids there's a playground here, and there are often floral, cultural and artistic displays on the grounds.
https://www.afar.com/places/bougainville-park-papeete