Going on holiday next week and plan to take my 2 year old swimming. She has done very little swimming up to this point so is not confident in the water. Have got swimming nappies etc but am wondering whether people recommend arm bands, or one of those costumes that has a float built in, or some other swimming aid? I've seen some people saying they don't think those are a good idea but I'm not that confident going without them. Advice much appreciated!