It's for DIY , these bubble inserts are designed to fit seamlessly into your plush dolls and stress balls. Made from soft, material, they offer a satisfying squeeze and bounce, enhancing the tactile experience of your creations. These white inner balls are easy to work with, making them a great addition to any crafting project. Features -Color:Transparent -Material:Soft rubber -Size:5.00X5.00X3.50cm/1.97X1.97X1.38in -Diy creativity: assemble your own bubbleblowing toy, making playtime more engaging and interactive -Safe for kids: constructed from soft rubber material, making it safe for children to handle -Easy replacement: includes multiple bubble core ball accessories for convenient replacement and maintenance -Beautiful bubble blowing: capable of producing beautiful bubbles, adding to the fun -Imagination enhancement: encourages children to explore their creativity and imagination, boosting their artistic abilities Package list: 10 Bubble Inner Balls