The Drums would be the easiest to play in my opinion... I am decent at the drums, keyboard, and organ... To master any of these instruments is all extemely hard, but if you can clap your hands on beat and stomp your feet on beat to a song, then you can get on the drums. I'm not saying that they would be real nice or anything, but that is why you see kids who are 3 and 4 who can get on the drums and hold a beat... But as many of you said, to be real good at it, none of them are easy... If you were to look at your congregation, how many people in the church would be able to step in on a sunday when the drummer isn't there, then look at how many could step in for your organist if he were sick or not there?