For our wedding, the reception location we chose agreed that we can use the bridal house as a babysitting area after the ceremony. We were going to ask one or two people to stay in the house and babysit those that are attending the wedding's children if they choose (as an option). Providing snacks, activities etc. and the parent's peace of mind knowing their kids are there but they can still have a good time without having to babysit them. It is probably 20 feet from the reception area. Should I include a small piece of paper in the invitation that states this? How should I provide this information to them?