Raft
That would be me in the water and Julia following. David is somewhere already underwater. We had a thing to stack all the floats/rafts and then try to stay atop the unstable structure in the pool. It was made intentionally unstable by the kids because the point was to hit the water and better if they took dad along. So I would try to stay on board as long as possible while the kids tipped, pulled, and pushed to get me into the water. No one was ever dry for long.