J.B.
I had my first in the pool when he was around 7 weeks. There's a great gadget you can get -it's basically a neoprene (what diving suits are made of) Baby Bjorn and several companies make them. One is by Body Glove and I got it through One Step Ahead, and the other one I just received and it's called Water Tot. They let you have hands free movement in water while keeping the little one very close. The neoprene also helps insulate the baby so he won't get cold and they help provide coverage from the sun!