This is a great idea you have and will certainly make for a good story and memories. I will be on the hunt. We just got home from Prince Edward Island where the rocks are all red. I said to my wife we should bring some back, but she didn't think so, since she is from there and use to the colour. So I can't get you an all red one, but here in Niagara there are parts with red clay soil so the search is on.