My 4.5 year old DS has been doing weekly (term-time) swimming lessons for the last 18 months and whilst he's very confident in the water he still can't keep himself completely afloat for any real length of time.
I also have a 2 year old DS so whenever we're all in the water together (local pool, on holiday etc) I always put arm bands on our eldest DS as a precaution as I'm always holding his younger brother.
I've heard armbands are counter productive to learning to swim though but not sure what else to do? Noodles and floats etc. are great but there's no guarantee he won't let go of them whereas armbands are fixed.
Any thoughts, tips, advice?