I took the Saturday Oak Park bike tour with my three teens. We also took the tour through Wright's house and studio.
I highly recommend the bike tour. It was super fun for me. The kids, however, were not quite as interested (since they had very little background knowledge).
You pick up your bike at a local shop. They are comfortable and easy to ride (there were no baskets on the bikes so don't bring along extras). Helmets are provided but not required. The roads are flat, the pace is leisurely. There wasn't a lot of traffic on the roads and it felt safe.
The tour takes you through the neighborhood viewing about 22 FLW houses from the street. The guide stopped at each house and gave some history and details, always allowing for plenty of time for photographs.
Our guide was not great. It seemed this was his first bike tour....he wasn't sure of the route. He referred to notes for each house. Still, he did an okay job and tried to answer all questions. I finished the tour knowing a lot more than when I started. He was especially good at outlining the development in Wright's designs. My only complaint with this tour was that we did not stop at the Unity Temple, not even breifly for a photo, we just rode right by.
House and Studio Tour:
We took the tour immediately following the bike tour. If you take both, plan on about 30 minutes or more between the end of the bike tour and the start of the home tour (the bike shop is at least 1/2 mile away - we walked between the two). We visited in mid July and it was hot. It is possible to linger in the air conditioned gift shop prior to the start of the tour.
You must check large bags before the start of the tour. There is no photography allowed inside.
Tours are carefully timed and move at a constant pace through the house and studio. There is not a lot of time to linger and ask questions. In fact, our guide, really didn't encourage questions or discussion.
I preferred the studio tour to the home tour. If you have time, I found the Robie House to be the most enjoyable visit...you get a better sense of FLW's designs.