The pull string vibration mechanism is good for adding a unique touch to your plush toys. Its compact design ensures it fits seamlessly into various stuffed animals, making it an choice for and hobbyists. The gentle vibration feature is particularly appealing for baby toys, providing a soothing and entertaining experience for little ones. Features -Color:White -Material:Plastic -Size:4.50X3.50X2.50cm/1.77X1.38X0.98in - use: constructed with plastic, the mechanism can be used for a long time, prolonging the life of your toys -Enhanced interaction: the pull string roller design is user friendly, making it easy for children to interact and improve their hand eye coordination -Versatile compatibility: these toy parts are easy to install and compatible with a variety of plush toys, increasing the variety and enjoyment of playtime -Convenient portability: lightweight and easy to carry, ideal for both indoor and outdoor activities, ensuring fun parent child moments anywhere -Child safe design: crafted with attention to detail, the smooth edges prevent skin irritation, providing and comfortable play experience Package list: 6 x DIY Plush Toy Mechanism