You should also check with your reception site to make sure they will allow this. My daughter's reception site wouldn't allow it. Open flames and the utensil used to roast the marshmallows both caused fire hazzards. Then they also stated that roasted sticky marshmallows and melted chocolate would be too hard to clean up. And if you have them outside, I have heard keeping the sterno cans lit is a problem and the station would need to be attended by someone. Just a few things to think about. It is such a cute idea, but in reality maybe not a good idea.