Description:

- Place of Origin: Guangdong China (Mainland)
- Brand Name: ST Model
- Color: Multicolor
- Gender: Unisex
- Age Ranges: 2-4 Years,5-7 Years,8-11 Years,12-15 Years,Grownups
- Model Number: Drinking Bird
- application: education children
- material: galss and plastic
- type: education toys

- Package Size: 18*6*5(cm)
- Package Weight: 60(g)

Description:

 

VIDEO: http://www.youtube.com/watch?v=Yk71GY02diY

 

The Original  Drinking birds are toy heat engines which mimics the motions of a bird drinking from a fountain or other water source. It is sometimes  considered a perpetual motion device.                               

When the head of the bird is moistened with water, then  it will repeatedly bend down and appear to be drinking from a cup water which it is  in front of it. The dunking is due to the evaporating water , which cools the head reducing the pressure of the gas inside. The liquid inside the bird rises up from his tail towards his head, causing the bird to bend down  and appear to be drinking. When  the bird dunks, the liquid returns to its tail, and the process begins again. In essence this is a small, cleverly designed thermodynamic engine which only needs water to run!

Gallery view:

 

Payment:

1. ESCROW 

2. Paypal

3. Bank transfer 

 

Shipping:

Item location is at China, default shipping service is shipping by China Post Air

Mail or Hong Kong Post Air Mail.
Please be advised that International shipping usually take longer than domestic, as it's based on shipping service provider and customs.
All items will be shipped within 1-3 business days upon receipt of payment (except Saturday and Sunday).

 

Returns:

Your satisfaction is our first priority. Defective product will be offered for an exchange or store credit. NO REFUND.
Returns are available within 7 days from the item's shipment date. All items MUST be returned in their original condition.
We do not reimburse the return shipping charges. Buyer is responsible for shipping and proof of delivery on all returns; please retain the tracking information until we ship the replacement item.
Thank you for your patience and understanding in this matter.