Y.B.
Try Cheerios....we all know you can't dunk them but the boys don't. You take about six cheerios & put them in the potty/toilet & let him try to dunk them by aiming, pointing & shooting! I know it sounds strange but it works & I've shared this with several mother's on here & they just loved it! The boys think it's a game but in actuallity their being potty trained & don't even know it:-)! Good luck & God Bless!