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Description
Ponderables EngineeringHere is the updated essential guide to engineering, an authoritative reference book and timeline about how technology has given shape to our civilisation. Engineering predates humanity; Homo habilis was knapping hand axes from fist sized flints more than a thousand centuries before the dawn of modern humans. Admittedly, the development of technology was slow back then, but we've made up for lost time since. Striding from the Stone Age to Silicon
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.8 ★★★★★
Based on 1991 reviews
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Product Reviews
★★★★★ 1
Can’t get it open.
We CANNOT get the screw out to put in batteries! Can you send me another?
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Reviewed in the United States on November 15, 2025
★★★★★ 5
Calming with a pulse
I bought these to transport puppies across the US. I put one in each carrier and the puppies slept on each plane ride. A total of over 5 hours on planes. Would totally recommend.
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Reviewed in the United States on May 19, 2026
★★★★★ 5
Great job
A+
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Reviewed in the United States on February 16, 2026
★★★★★ 3
Have to manually turn off-no timer
Just okay. It works, but my other units are on a timer and turn off themselves. This doesn’t shut off unless I manually turn it off so the batteries don’t last.
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Reviewed in the United States on May 6, 2026
★★★★★ 5
It looks like a Totoro
Color: Hare - Large
Great toy ! Pibble loves it! an it looks just like a Totoro which is huge plus at our house. These are very durable and once de gloved the body will last a very long time if your dog isn’t a big chewer.
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Reviewed in the United States on December 29, 2025
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