Under $20

Gecko Run takes classic marble runs to the next level with new creative challenges and less restrictive building requirements. This innovative marb...

Gecko Run takes classic marble runs to the next level with new creative challenges and less restrictive building requirements. This innovative marb...

Gecko Run takes classic marble runs to the next level with new creative challenges and less restrictive building requirements. This innovative marb...

Gecko Run takes classic marble runs to the next level with new creative challenges and less restrictive building requirements. This innovative marb...

Lost your marbles? Get more! This is a pack of 7 metal replacement marbles for the Gecko Run marble run system.

Discover the universe’s most incredible sights – and learn how to build them!Look inside planets and the sun, find out how rockets are launched, an...

An introductory primer for kids learning about the “M” in “STEAM” : Mathematics. Math is the basic foundation upon which most of the other areas o...

From the rain in the sky to the grass at their feet, help your child understand the world around them with the guidance of this fun and exciting in...

From the factory to the road, browse through more than 170 cool cars — from hatchbacks to hybrids — in Pocket Genius: Cars. Trace the history of th...

Discover the fascinating world of inventions and technology. From the first tools to the latest gadgets, Pocket Genius: Inventions showcases key in...

From marvelous galleries of the Big Dipper, Little Dipper and other constellations to in-depth looks at Mercury, Venus, Earth, Mars, Saturn, Uranus...

Put your mind to the test to solve twenty fun science-themed mysteries in Sleuth & Solve: Science!How does a wildlife photographer know that an...

It’s hands-on science with a capital “E”—for engineering. Beginning with the toppling of the Colossus of Rhodes, one of the seven wonders of the an...

Stand back! Genius at work! Encase your little bother in a giant soap bubble. Drop mentos into a bottle of diet soda and stand back as a geyser eru...

Get ready for the electrifying biography of Nikola Tesla--part creative genius, part mad scientist, and 100% innovator.When Nikola Tesla arrived in...