This nail-biting and thumb-sucking prevention pen is a multi-functional solution designed to help kids break unwanted habits like nail biting, thumb-sucking, and pacifier dependency. With a unique bitter taste, it instantly triggers a "biting = bitter" memory, making habit correction natural and effective. The long-lasting, water-resistant formula provides 6-8 hours of protection with just one application. Its compact, portable pen design allows for easy use anytime, anywhere. Made with gentle, plant-based ingredients, it is safe, odor-free, and perfect for delicate skin, offering a reliable and convenient solution for habit correction.