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First Big Book of How: How do polar bears keep war

Marsoni M251S
Sale price$25.00
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Get it in 3 business days with 1 day shipping. Friday, May 29
First Big Book of How: How do polar bears keep warA compendious and stunningly illustrated fact filled book for children who have endless questions about how the world works. How do scientists see into space? How do polar bears keep warm? How do keys open locks? How do fireworks explode? Featuring more than 150 compelling questions about space, Earth, machines, buildings, animals, and the human body, this magnificent book by the author and illustrator team behind the bestselling First Big Book of Why
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4.2 ★★★★★
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Suzanne
Lowell, US
★★★★★ 5
Fits my old eufy
Size: 3+12+12+2+1 pack
This set fits my older model eufy and has extra parts for newer models. The filters did not fit our model (our fault for not doing proper research) but the fan sweeper is awesome.
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Reviewed in the United States on October 5, 2024
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Dan
Natrona Heights, US
★★★★★ 5
Lots of extras!
Size: 2+12+12+2 pack
The brushes are a bit flimsier than the original but otherwise fine. I needed it for the rectangular filters more than anything
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Reviewed in the United States on March 7, 2026
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Verified Purchase
Pan8ita
Omaha, US
★★★★★ 5
EUFY 11S
Size: 2+8 pack
Used to replace the ones for my EUFY 11S vacuum. They fit just like the ones and got my vacuum back to cleaning really good. Didn’t realize how loud my vacuum had become until I replaced these parts.
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Reviewed in the United States on December 19, 2025
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Armeeda
San Leandro, US
★★★★★ 5
Get this!
Size: 3+12+12+2+1 pack
Very nice pack of essentials for my robot.
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Reviewed in the United States on March 17, 2026
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dawn swiney crowe
Grantham, US
★★★★★ 5
Top notch price buster
Size: 11SMax-24Pack
Perfect fit, Perfect quality replacement and great deal!!!
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Reviewed in the United States on April 25, 2026

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