If you ever get banged on your head or leg and there isn't anyone around to help you, remember that you can use a chilled bag of french fries, peas, or just about anything from the freezer that's not dangerous as an ice pack!
To make a convenient ice pack to soothe minor scrapes, bumps and bruises, wet a small sponge and freeze it in a zip-lock type plastic sandwich bag. Novelty shaped sponges are especially popular. When your child is injured, hold the pack on the injury. As the sponge defrosts, it will conform to the body's shape. Use a new plastic bag each time you refreeze the sponge.
How can I make an easy costume?