It's not the play, it's who you're playing with!
Last Tuesday we went to the beach...Lake Michigan has beautiful, sandy beaches! 
People look at them and comment on how close they are! They "play" together, whether it's video games, at the beach, on vacation. Play has helped them build a relationship.Water fights, water pistol fights, etc...
Why does water seem to play such a part in the play in my life? Maybe because there can be so much mischief in water - you see it and you want to splash, to throw it, to play!
I know that I need more play in my life...or maybe I just need more water...
Gwynne
Nice that your son and daughter play well together. I'm sure you are to "blame" for that. 😉 I absolutely LOVE water also. You point out a very good reason for that.
Blair
My kids typically play well together. It's nice when they do, I would like for them to be and stay close. I agree that company can make all the difference in the world when it comes to play.
And water is fun :o)