"They are tearing the park down," said Zaire and Zion's father, Miami Heat guard Dwyane Wade. "I wanted to surprise them. We came up early this morning. They didn't know we were coming, and they're very excited to be here."
Kids are playing, but NBA stars still on standby →
"The President and Michelle Obama have this great cause, and they wanted everybody to get out and support it," Wade said.