The Choo Choo Barn sounds like something just for 5-year olds.  You couldn't be more wrong.  The size and scope of the model train set is stupendous.  Although there are several sets of trains as you walk through the room, they have also cleverly added many of the delightful Lancaster touches such as The Dutch Haven Restaurant and Dutch Wonderland.  Thomas the Train is there, of course.  The smaller children spend most of their time trying to find him.  Carnivals, parades, the circus, the zoo...all animated and fun to watch.  Don't think you have to have children to visit the Choo Choo Barn.  Adults would appreciate it even more.