This is not a large museum, so spending a couple of hours should cover it all. There isn't much on the ground floor, most of the exhibits are upstairs and those were quite cool. There are some displays of robots, hologram (awesome!) and some kinetic installations which were really cool, some of which you could interact with.The gift shop on the ground floor has some pretty good items to take home. I was in Boston for over a week so I had time to visit this place, but if you're on a tight schedule, I'd suggest you skip this.