Usher's Son -- Recovering ... Chillin' Out Maxin, Relaxin' All Cool

Usher's 5-year-old son is recovering well after his tragic pool accident earlier this week ... and doing what every recovering sick kid in the hospital does ... watching "The Fresh Prince of Bel Air."

Usher's ex Tameka Raymond posted this photo of lil' Usher to her Instagram Saturday, with the caption, "Woke up cheerful, happy and hungry ... watching Fresh Prince. What does he know about Fresh Prince? lol."

TMZ broke the story ... Usher's son was hospitalized after he almost drowned in a pool under the care of his aunt. His parents decided to keep him under doctors' care until they were 100% sure he was okay.