The ground floor starts out with a floor-to-ceiling climbing enclosure, sort of a giant Habitrail for children. The second floor has a staffed kids’ makerspace and a variety of play-to-learn exhibits for the littles, about lobstering and firefighting and veterinarian-ing. But the real action is on the third-floor, where touch-friendly aquarium tanks sit next to a dark room full of psychedelic light and color experiments and whole area full of Rube Goldberg–ish physics-play machines: vacuum tubes and catapults, waterwheels and watercannons. After a $14 million capital campaign and a long construction period at Thompson’s Point, Portland’s new kids’ museum opened in 2021 to rave reviews. Check the schedule for theater, concerts, and more in the 100-seat performance space.