If you boil eggs and then store them in the fridge before cracking the shells, and sometimes get confused as to if they are boiled or raw, you can do two things..... When boiling, drop in a few drops of food coloring and you'll remember that the colored eggs are the boiled ones. Second trick is to try "spinning" the suspect egg to determine boiled or not. A boiled egg will spin like a top and a raw egg will not.