Dd has just got the hang of armbands and is desperate to go in the large swimming pool but she's rubbish in the cold. Why can I put her in to keep her warm? I don't want to use one of those wetsuit things as it will make her more buoyant.
Second the bodysuit idea along with the float if she needs a buoyancy aid.
For afterwards, invest in a large microfibre towel that will have her dried off in no time plus a microfibre hair wrap. Fleecy, warm sweatpants and sweatshirt and thick socks to dress in should help her worm up again.