Kids Puzzle DIY Science Stethoscope Popularization Toy Children Simulation Stethoscopes Doctor Assemble Toys Gifts Knowledge:    The stethoscope is used two principles: vibration produces sound, and sound is vibration. There is a vibrating sheet in front of the stethoscope. The stethoscope will vibrate follow the Human organs. The vibrating sheet vibrates to produce sound, which can be transmitted in solids. So the sound passes through the solid to the ear by vibrating sheet.    Sound is the propagation of vibration, which is absorbed by the air as it transmits forward in the air, so it does not transmit very far, but in some solid object it can spread far. Toy type: Puzzle assemble toy Material: Plastic Product size: 83 X 11cm/32.68 X 4.33" Net weight: 40g/set Color: Yellow,Red(Random Color) Assemble Steps: Step 1: Fix the vibrating diaphragm sheet into the probe head. Step 2: Fix the elastic support and soft earplugs. Step 3: Assemble sound transmitting pipe. Step 4: Fix all the components into the corresponding positions in the sound transmitting pipe,it finished. Note: 1. The product is not with the battery,its accessories is random color. 2. Containing small accessories, please take care of the baby to avoid swallowing. 3. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! 4. Please allow 1-3cm measuring deviation due to manual measurement. Package inckuded: 1set X Stethoscope Assemble Toys
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