Foam Minecraft swords are all the rage, and they can be bought online for a pretty penny. I decided to use the thinner 1″ Pink Panther insulating foam. Here are some foam cutting tips: Unless you are cutting the foam with a heated wire, or an extremely sharp knife, it is challenging. The easiest way I found to cut the foam involved cutting an outline of the shape and then breaking off the excess pieces of foam. After I cut the swords out, we painted them with acrylics. The wet paint deterred swordplay, creating a highly safe and successful activity.