My 4 year old son enjoyed the pin trading, but it was distressing for me because we spent so much money buying pins he liked and he would always trade the ones we bought for cheap/non-wdw pins. Since I didn't want to be the one telling him which ones to pick, I could only bite my tongue when he'd point to the Rainforest Cafe Tennessee pin, or the Mickey Delaware pin, or the lion pin that's not actually Simba or Mufasa. I think that many CM's have a terrible time saying "no" to any child that many pins get traded regardless of whether they are Disney or not and if you have a kid like mine, they'll always find the "weird" ones. I think next time we go(in May, my son is 5 now), I'll let him wear his lanyard, but won't remind him that he can trade, because I think he's forgotten. I would feel funny trying to trade away some of the pins we got last time, so we may be moving on to pressed pennies. Thanks everyone for the pressed penny idea!