The cast of the hit Netflix series “Stranger Things,” which rolls out its third season July 4, has grown up a little since the show debuted in 2016. As one character on the show declares in a new trailer for “Stranger Things 3,” “We’re not kids anymore.”

The streaming service adds in promotional material accompanying the release of the trailer, which focuses on summer 1985: “One summer can change everything.”

Here’s the trailer, scary monster and all …