Visited here recently with a small club group. We greatly enjoyed the multimedia Amish Experience presentation, "Jacob's Choice." This is a sophisticated multimedia presentation and it may be good to know in advance that there are some loud noises, water mist sprays, and light flashes that could potentially be startling to some more timid attendees, but that we found highly enjoyable and engaging, and the overall story, very educational about Amish history here and in Europe, as well as current Amish life.
The presentation was followed by a visit to the large gift shop, which also houses ample, clean restroom facilities. A large variety of souvenir and local items are available.
After the gift shop visit, we enjoyed a terrific presentation by one of the docents, taking place in the adjacent Amish school classroom. More information on Amish education, religion, and daily life were presented in a very enjoyable way, with plenty of time for Q and A, too. Then we walked through the adjacent "typical Amish home" with that docent, learning more about modern and traditional Amish life.
All in all, this was a very pleasant and informative experience and we walked away knowing far more about the Amish, both in history and current day to day life, than we did before we arrived. Definitely worth a visit!
I believe a farm tour via small bus is also available, though time didn't allow us to do this. There is also an onsite hotel. Parking is free and ample.