Material: plasticSize: about 13cm in length 11. New toys at the party: write your blessings on the gifts for friends to make the party more interesting. Use the light on the pen cap to make the text look so interesting and amazing, birthday gifts, Halloween gifts, children's Christmas gifts. 22. Secret pen: After writing with a pen, the ink will not be visible. You need to turn on the purple light on the lid to illuminate the writing area so that you can see the confidential information clearly and perfectly. 33. Safety pen: harmless and odorless ink, a healthy toy for children. Smooth, colorful disappearing ink on T-shirts, paper, skin, and any surface. Permanent but washable. 44. What do you get: 2 reusable invisible pens with built-in lights. (Please be careful with small items: children over 3 years old).