Material: This bubble machine is made of durable ABS material. This little yellow duck is made of safe, non-toxic silicone. Perforation-free Adsorption: Our bubble machine can be absorbed on smooth surfaces, such as glass, ceramic tiles, bathtubs, etc., through the 4 vacuum suction cups on the bubble machine without perforating or using glue. 30% Shower Gel plus 70% Water: No need to buy bubble liquid separately, just mix 30% shower gel and 70% water as bubble liquid to use. Installation instructions: The first step is to fix the bear bubble machine on the wall. The second step is to remove the water tank. The third step is to add 30% shower gel and 70% water to the water tank. The fourth step is to put the water tank back into the bear bubble machine and press the bear's nose to produce bubbles. Finger Exerciser: Squeeze them and will make a cute sound and listen the adorable little yellow ducks quack.These rubber ducks can help to children's physiology development by continuous squeezing them.