THAMES & KOSMOS

Excavate three real mineral specimens from a plaster block: quartz, amethyst, and pyrite (also known as fool’s gold!). Use tools like a real rock h...

Unearth your inner geologist as you break open ten real geode specimens to reveal beautiful, sparkling crystals inside. Using your own hammer and t...

Grow a beautiful, colorful crystal geode — a hollow rock with crystals inside it — by first molding a plaster shell and then filling it with a crys...

Craft crystal geodes and fun shapes to learn about the structure and geometry of crystals. Grow dozens of dazzling crystals and conduct 15 illumina...

Grow sparkling, colorful crystals overnight from a safe solution of potassium aluminum sulfate. Single out the largest crystal shard, redissolve th...

Grow a big beautiful crystal and assemble a special platform to display it with a color-changing LED circuit inside. Learn about crystal formation ...

The sands of time have buried the pharaoh’s treasures. Assume the role of a skillful archaeologist as you excavate the site with a hammer and chise...

A geological expedition in the palm of your hand! Each of these fun, low-priced excavation blocks contains one real mineral or fossil specimen. The...

Unearth the secrets of geology as you dig deep into the science of rocks and minerals and the crystals that form them. Through 18 hands-on experime...

Explore the natural beauty and wonder of crystals by growing them yourself in many different shapes and colors. Set up your lab base station — the ...

Let’s rock and roll! Amp up your rock collection and explore the secrets of geology with the Thames & Kosmos Rock Tumbler! This custom-designed...

Keep on rockin’ and rollin’ with this refill pack for the Thames & Kosmos Rock Tumbler. This pack includes a one-pound assortment of natural ro...

Discover our Earth your way! Open the book to any page, jump forward and back, dig deeper into your favorite topics, and become a Thames & Kosm...

Grow dozens of dazzling crystals and conduct 15 illuminating experiments with this classic science kit. Experiment with four chemically different c...