"Play"

[Dribble]

I've always used, "Here you go" before handing the ball to the thrower and may precede that with, "Are you ready?"

IMO, I've never liked "Play" because while it might be a quick saying, it sounds too curt to me and I want to sound more approachable.

Similarly, I say, "You have the full baseline" or "Remember, you have to stay in that spot."

Just like how I wouldn't want a kid using one or two word lines on me, I try to use full sentences because it really doesn't take that much longer, it's more respectable and is a little step that I think builds more rapport.