Mix corn syrup, water, and sugar. Boil on high heat until the mixture reaches 280*. If you want, now is the time to add oil flavoring and food coloring. Pour into mold of your choice, but work fast. Mixture hardens fast.
Step 3: Finishing It
Let mixture sit until it hardens. You can break it by dropping it onto counter, punching it, ETC. Congratulations! You have just made hard tack candy.