Set of 7 Invisible Pen Maker Kids Message Pen with Built in Light Feature: Color: black, blue, red, green, purple,, yellow Ink properties: Invisible ink Style: Specifications: 13.4cm Use the ink pen to write words or messages, the writing will disappear when the ink is dry. when you the light on to them, the behind reveals For saving batteries life, plug the write card tag back to the pen when you don't use the light Please don't the light directly to eyes Package Content: 7 pens 【Precision in Every Line】 Achieve precise and clean lines with our colored gel pens. The fine tips ensure accuracy, making them perfect for detailed drawings, intricate designs, and note-taking. 【Smooth and Consistent Ink Flow】 Experience a smooth and consistent ink flow with our gel pens. The high-quality ink glides effortlessly on paper, providing a reliable and enjoyable writing or drawing experience. 【Vibrant and Diverse Color Selection】 Express your creativity with a diverse range of vibrant colors. Our colored gel pens offer an array of shades, allowing you to add flair to your projects and make your artwork or notes visually appealing. 【Quick-Drying and Smudge-Proof】 Enjoy the convenience of quick-drying ink that minimizes smudging. Whether you're left- or right-handed, our colored gel pens ensure your work stays neat and smudge-free. 【Versatile and Multi-Purpose】 Designed for a variety of uses, our colored gel pens are versatile tools. Whether you're journaling, coloring, or adding accents to your work, these pens provide the versatility needed for creative expression.