My apologies if this has already been mentioned. On page 16 of the 2018 guidebook, there is a little chart with height requirements. The 38 inch column and the 40 inch column are identical. I think the only thing missing thatís 38 inches is the mine train? I thought barnstormerwas 38 too, but I double checked and itís only 35 inches! I would not have remembered that correctly!