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Description
The Math Inspectors: The Case of the Mysterious Mr. Jekyll (Book #2)Stanley, Charlotte, Gertie and Felix are just your typical twelve year old kids. They love to hangout after school they love burgers and milkshakes and they love math. And if there's one thing they love even more than math, it's solving mysteries! Thankfully, their hometown of Ravensburg, New York has plenty of mystery, and quite a few secrets. Do you want your kids to love reading, to get lost in an adventure, and maybe even enjoy math? THE MATH
Stanley, Charlotte, Gertie and Felix are just your typical twelve-year old kids. They love to hangout after school...they love burgers and milkshakes...and they love math.And if there's one thing they love even more than math, it's solving mysteries! Thankfully, their hometown of Ravensburg, New York has plenty of mystery, and quite a few secrets.
Do you want your kids to love reading, to get lost in an adventure, and maybe even enjoy math?
THE MATH INSPECTORS HAVE AN ANSWER!
Each book in this popular mystery & detective series is designed to draw readers aged 9-12 into a mystery so intriguing, with characters so smart and funny, that they forget they're also learning about math.
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4.6 ★★★★★
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Product Reviews
★★★★★ 5
dog ball
Color: Blue
This ball is perfect for keeping my dog active and entertained. It's made of strong, durable material, ideal for games of fetch. It doesn't break easily and is light enough for him to carry in his mouth without any problem.
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Reviewed in the United States on February 23, 2026
★★★★★ 2
Fun but not for rough play.
Color: Orange
The ball contented our “golden” Jaxson for about 15 minutes. He then thought it was a regular ball and it’s just a little delicate for a big dog. I just wrote it off as a loss. Great idea but should be more durable.
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Reviewed in the United States on April 7, 2026
★★★★★ 5
Long lasting charge!
Color: Orange
My 50 pound goldendoodle absolutely loves this ball. It keeps a charge for a long time. It turns off
When it’s not being used and we play with it every day.!
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Reviewed in the United States on March 24, 2026
★★★★★ 5
Fun toy
Color: Orange
My standard poodle loves this toy. It holds a charge for several hours and is well made
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Reviewed in the United States on April 8, 2026
★★★★★ 5
This is a great ball for high energy dogs.
Color: Blue
I have a Belgian Malinois, so you can imagine the Maligator jaws. Just opened this today and let her play with it indoors. She LOVES IT. It wore her out and it’s a toy she can really stay focused on without needing me to throw or roll for her. It moves on its own! I supervised her play. I was hoping it was too big to get under the couch, but no. It goes right under it. I had to block off the gap so I didn’t have to keep getting it out from under for her. The outter “shell” is very durable! When she had resting moments, she chewed it pretty good - I could hear the material squeaking against her teeth. I was worried she was tearing it up, but nope! Not a mark on it. It’s easy to set up and operate. It needed charging before play. After hours of play, she was able to somehow unscrew the outter shell. This concerned me bc the smaller, inner ball mechanism came out but I saw it right away and was able to put it back together. So, make sure it’s screwed together tightly (which I thought I had done without breaking it) and check it from time to time to make sure it hasn’t loosened. This is a great ball for her incredible high energy drive. It gives her the work and fun play she needs to get tired, which I love. This toy is on the expensive end, but so far it’s worth it. Now we’ll see how long it lasts!
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Reviewed in the United States on October 7, 2025