Entering Greenfield Village is like stepping into an 80-acre time machine. It takes you back to the sights, sounds and sensations of America’s past. There are 83 authentic, historic structures, from Noah Webster’s home, where he wrote the first American dictionary, to Thomas Edison’s Menlo Park laboratory, to the courthouse where Abraham Lincoln practiced law. The buildings and the things to see are only the beginning. There’s the fun stuff, too.