Typically, a swallowed coin isn't a big deal. Everyone in my family has swallowed at least one in their life. 3-12 days later, it passed with a bowel movement. However, there may be a cause for concern if he hasn't had a bowel movent in ten days. That's an emergecy situation, as the coin could be stuck and blocking feces from moving through and out of the body. If he has had a movement, even without the coin, that's a sign that the way is clear. Often times, the coin will stay in the stomach longer than food, because it's trying to be digested. Eventually, it'll be released from the stomach and into the intestines. If you want to move things along a little quicker, prunes, peaches, and apple juice will help soften things up and make the coin easier to pass. If he's pooping, it's normal. If not, seek emergency care.