This is something that's good for everyone to keep in the freezer. You never know when your husband may come home from work (like mine did this morning) with horrible back pain or one of your children falls, bumps heads.....etc. It's easy and inexpensive. You could easily break this down into several small freezer bags to have "boo-boo bags" on hand for the kids. Sometimes that's all they need is a little "boo-boo bag."
2-gallon size freezer zip lock bags
First bag add 4 cups of water and 1-1/2 cups of Rubbing Alcohol (no or as little air as possible)
Put the first bag into the second bag and put in the freezer for 24 hours. When it's cold it's not frozen hard and you're ready to heal any boo-boo Daddy size or child size. : )