The same girl who grew up on Westbury New Road just watched her own kids climb the playground she used to. The street she was raised on now carries her name. Rihanna’s three children, sons RZA and Riot and baby daughter Rocki, spent the afternoon on the swings and slides at a playground she visited as a kid in Barbados. The August 14 outing was part of a wider homecoming with A$AP Rocky during the island’s Crop Over season. Rihanna carries baby …