RM100 A-B Chain & Sprocket Kit

Marsoni

M251S

$73.95

Get it in 3 business days with 1 day shipping. Friday, May 29

RM100 A-B Chain & Sprocket KitNote: Image is for illustration purposes only

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We offer a 30-day return/exchange service after receiving.
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I have a grandson (5yrs old) who loves "There was an old lady who swallowed a fly" books, and is obsessed with black holes as well. He asked santa for a black hole for Christmas and his mom told me, "good luck with that", so when I found this, it was perfect! He absolutely loved it and it's a cute book to read.

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Reviewed in the United States on February 5, 2025

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Amazon Customer

Boise, US

★★★★★ 5

Love it!

Format: Paperback

My 6 year old LOVES this book! I read it to him every night that I know it by heart. He’s extremely fascinated by black holes, and It has really got him curious about cells and atoms.

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Reviewed in the United States on March 13, 2026

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Delayed Gratification

Lexington, US

★★★★★ 4

2nd book if you have black light

Format: Hardcover

The book is ok, with the same plot as "there was an old lady who swallowed a fly" but there is a second book that goes back to front if you have a blacklight. Some of the pages were not printed well with the invisible ink but I really liked that second book better, as it explains the terminology like quarks and atoms. It is a fun book but having a black light is a must.

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Reviewed in the United States on January 19, 2024

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Amanda Embry

Natrona Heights, US

★★★★★ 5

Fun book to read!

Format: Paperback

Such a fun book for my boys! They love it!

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Reviewed in the United States on November 14, 2025

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