We took DS3 on our last trip in September. He wasn't scared at all. But, I didn't think it was geared toward their age group. Honestly, its pretty late for a 3 yr old and unless your going to have a REALLY calm relaxing day, I think it's too late and too much for a 3 yr old. There were also much older kids on the bus on the way back to the hotel who were falling asleep and just miserable. Also, keep in mind that if it's a late night, chances are the next day won't be an early start. We'll wait until DS is MUCH older before trying this again.