Rubbing Alcohol Ice Pack
Put 1 part rubbing alcohol and 3 parts water into a zip top bag. Press out as much air as possible and place into a second zip top bag. Food colouring can be added in your child's favourite colour or just to distinguish the bag as an ice pack. Freeze flat.
Washcloth Ice Pack
Fold a washcloth into quarters. Wet it thoroughly and place into a zip top bag to freeze. For children, use their favourite colour or character/superhero. You can also use a red washcloth for any boo-boos that bleed. For adults, use a small handtowel.
Sponge Ice Pack
Soak a sponge in water and then freeze in a zip top bag. This is ideal for children's lunch boxes as they are safe and not too expensive should your child lose one (or two!).
Water and Salt Ice Pack
Add 2 tablespoons of salt to 2 cups of water and put into a zip top bag to freeze.
Corn Syrup Ice Pack
Fill a zip top bag about 3/4 full of corn syrup. Add food colouring if wanted. Place into freezer.
Double bag the baggies (with zips on opposite ends) or vacuum seal to help prevent leaking. Wrap all ice packs in a cloth before using.
Have you tried any of these? What do you use in your family?