For kids under 10 or so—the sweet spot is ages 1 to 7—this is one of the best play spaces in the city, with lots of stuff to climb on and crawl through and build on. Kids work in a “construction” area, create giant soap bubbles, shake it on an illuminated dance floor, visit a Japanese house, play grocery store in a bodega in the Boston Black wing, explore the laws of motion by whacking golf balls along room-long ramps, and scramble in and up a three-story-tall climbing maze. And that’s just for starts. For children 3 and under, the PlaySpace room is packed with toys and activities and peers their size. Among several food options nearby, a favorite is Pastoral (345 Congress St.), which is fancy enough to feel special and still accommodating for kids.