Thames & Kosmos

Build five out-of-this-world robots that are powered by the sun — batteries not required! First assemble the main robot, Helio, complete with solar...

Wow future geologists and rock-loving kiddos with a crystal-filled kit! Curious STEM learners customize the included iridescent display case by dec...

Marvel at the wonders of the universe with this mesmerizing electric light show. The plasma ball creates a fascinating display of glowing electric ...

Set the planets in motion with a flick of your wrist! Build a mechanical model of the solar system including the sun and eight planets (also known ...