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Handmade Earthquake Alarm Science Experiment Kids DIY Assembly Wooden Toy Gifts

$ 3.94

Availability: 98 in stock
  • Restocking Fee: No
  • Brand: Unbranded
  • MPN: Does Not Apply
  • All returns accepted: Returns Accepted
  • Return shipping will be paid by: Buyer
  • Item must be returned within: 30 Days
  • Condition: New
  • Refund will be given as: Money Back

    Description

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    Product Description
    Description:
    Handmade Earthquake Alarm Science Experiment DIY Assembly Toy Wooden Children Educational
    Toys Birthday Gifts
    Seismograph knowledge:
    The world's first seismic instrument. In AD 132, Zhang Heng, the scientist of Eastern Han Dynasty, invented the world's first seismic instrument-seismometer and was verified in practical applications. Unfortunately, physical objects and patterns of the seismograph were lost. Only written records were left, and the physical objects were riddled with mysteries.
    Earthquake alarm principle:
    When shaking small production, the copper wire of the glass beads will contact with the O-shaped lamp, the line is connected, and the buzzer sounds.
    Tip: This material does not contain two AA batteries, please bring your own.
    Notes:
    Due to the different display and different light, the picture may not show the actual color of the item. Thanks for your understanding.
    Included:
    1 bag X Spare parts
    pictures
    Warranty
    12 months Warranty. Buy with confidence!
    If you are not satisfied when you receive your item, please return it within 14 days for a replacement or money back. Please contact me before you return it.
    If item is defective in 3 months, We will send you a replacement without extra charger, or offer refund after we receive the defective item.
    If item is defective after 3 months, you can still send it back to us. We will send you a new one after receiving the defective item. But you have to pay the extra shipping fee.
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    We are not responsible for any custom duty or import tax.
    We will leave POSITIVE FEEDBACK after receiving the payment. Please contact us if you are not satisfied with the item after receive it.
    All messages will be answered within 1 business day. If you do not receive our reply, please kindly re-sent your message and we will reply to you as soon as possible.
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    Contact Us
    Our office hours are 9:00 a.m to 6:00 p.m (GMT +8) of Monday to Saturday.
    And our Office is closed on Sunday and public holidays.
    We apologize for the late reply during the holidays.