Using your Dennis The Menace kids costume is super easy. First, put on the red and black striped top. Make sure it fits comfortably. Then, slip on the shorts with the logo. It'll give you that authentic Dennis look. Don't forget to put on the mask to complete the transformation. When you're out having fun in the costume, be careful not to tear the fabric. Avoid rough play that could damage the mask. After you're done wearing it, take off the costume gently. You can hand - wash the top and shorts in cold water with mild detergent. Let them air - dry. For the mask, use a damp cloth to wipe it clean and keep it in a cool, dry place. This way, your costume will last for many more fun adventures as Dennis The Menace.