Hi is it normal for a 6 year old to hold pee to play until he's desperate. he also gets up twice a night to pee some nights. he does have accidents but not all the time?

Holding pee during playing is common in kids but waking up at night for voiding two times seems uncommon unless he drinks a lot of fluid before bedtime. You can advise him not drinking too much water after the dinner then observe; if he still gets up for voiding a couple times you should request his doctor to have blood test done for checking kidney function just to be sure.