My husband and I took our boys ages 15 and 11 to Marengo Cave on a summer Saturday afternoon. It was crowded but we only waited approx 7 minutes to go on our tour. We chose the Crystal Palace tour. It was really cool and our boys enjoyed it as well. It cost $46 for the four of us. We used the online coupon that we printed up at home. You get a discount if you by the combined ticket for both tours but since we were limited on time, we only did the 40 minute Crystal Palace tour. The Dripstone Trail tour is an additional hour. The guide was very knowledgeable and professional. Our tour group consisted of about 20 people, all families of all ages. The tour guide was explaining things and a lot of times it was hard to hear her over the crying baby and 6-7 year old boy that kept talking & running around. There were other small children on the tour as well but they were not disrupting the tour or making it difficult for the others on the tour to hear the guide. I would not recommend people to bring their babies on the tour. Small children are okay if they know how to act on a guided tour. The cave was unique and worth the money to see despite the disruptions.