Hey!

I have the 33' round Ultima.
I have 8 kids.
They are 11, 9, 8, 6, 5, 3, 1, & 0.
Everyone gets in the pool except the newborn.
All of them wear life jacket zip up style swim suits. You can get them at Toys are Us. Look at the floation levels on them and get the one that has
PREMIUM for Buoyancy
Here is a pic of something similiar. This picture only goes up to Deluxe.
You want the one that is better than this:


Make sure you get the right size. They seem to run big.
There are many different styles, some with hoods, sleeves, no sleeves, ect ect.
Walmart also has some but get the best you can. And remember these are not life savers but swimming aids.
I don't like the boating kind ( found in sporting goods) they are very uncomfortable and hard to swim in & tend to push the kid's head under water if they are not perfectly fit.
Just make sure you are there and watching him at all times and never let him out of the house w/o the floation suit on.
Only 2 of my kids can touch the bottom.
The kids are starting swim lessons soon. And it is the kind of swim lessons where they just learn to SWIM and none of the other stuff.
I put my kids in the swim lessons at the public pool in the past- they had private lessons and they still could not really really SWIM.

~Hoffmans