Megan has recently taken a big interest in airplanes. If she hears a plane fly overhead, she looks up, points to the sky, and says, "Airplane, airplane!" So we thought she might enjoy going to the RDU airport observation deck to see the planes take off and land. We went Thursday afternoon which turned out to be a good, though hot, day to see some planes.
There's also a small playground at the observation deck and a kid-sized landing strip. Megan had fun playing in the sand at the playground almost as much as she liked seeing the planes.