Can anyone tell me about the selection of bikes at Castaway Cay? I have heard they have small bikes, do they have training wheels? If not, do they have the pull behind trailer for kids? We have a 5 & 6 yr old and the 5 year old is a speed demon with training wheels but we don't know if she will be on just 2 wheels by then. The 6 yr old is terrified to go over .0005 miles per hour so we are thinking if there is a seat or trailer she can sit in, it would be better. Anyone that can help with our choices would be greatly appreciated.