We did bring ponchos but only used them on Kilamanjaro Falls (yes, we were sissies!). I did notice that when my very tall DS3 got off, he was tripping over the bottom of the poncho-could have been dangerous. I had brought a pull over windbreaker for him for use in the rain and would recommend that over the big poncho for smaller children- or get a poncho and check the length so you can cut it to fit first.