We are going on a caravan holiday over the weekend. Most likely using the caravan pool a few times and possibly spending time at the beach. We have a 5yo who has swimming lessons but not confident swimming yet, a 3yo and a 1yo. Two adults will be with them at all times. What flotation devices are best? Should they all be in those life jackets? Armbands? We never go swimming as a family so I may be overthinking but would be helpful to have some advice from those of you that have any as I dont want to waste money on aids that arent that useful. Thankyou!