describe: Children's automatic silent bubble machine---a simple and easy-to-play gradient rainbow bubble machine. Children need to add 3 AA batteries (not included). Press the button lightly, accompanied by bright lights, the electric bubble machine will generate 2000 crazy bubbles. Multiple colorful bubbles generate bubbles every minute, almost silently, allowing children to immerse themselves in the dreamy bubble-colored ocean world without interruption, attracting children's attention and exciting children and pets. EASY TO CARRY AND LEAK-PROOF DESIGN - SIZE OF THE RAINBOW BUBBLE Manufacturer dimensions are 12.5 x 5 x 13 cm, 320 g. Each bubble machine for kids comes with adjustable straps whose length can be adjusted to the desired size. Fully enclosed design, good sealing and light weight. Children can carry the bubble machine on their backs and spray happy bubbles all the way, running and playing without worrying about the bubbles coming out. ABS AND SAFE AND NON-TOXIC --- This fantastic bubble machine is made of child-friendly and non-toxic ABS material, safe for children, babies and toddlers. Durable, safe and stylish, one-time purchase for long-lasting fun. It complies with American toy standards and has passed safety testing certifications such as CPSIA, ASTM, and CPC. The surface design is smooth, and the surface of the body is smooth and burr-free, so it will not hurt children's hands. Easy to use and suitable for children. Perfect gift idea --- Our automatic bubble machine has a unique cloud-shaped design, bright colors, soft touch and cute shape. Once the bubble machine starts up, boys, girls and preschoolers will go crazy with joy This is definitely a great birthday gift for little ones 3 4 5 6 7 8, a fun Easter gift and a great Christmas gift, the perfect outdoor party toy for kids. Package contents: 1 piece bubble machine