C5 Starter Rock Tumbler Kit for Kids & Beginners, Quieter Rock Polisher with Upgraded Noise-Reducing Cover, 3 Speeds, 9-Day Timer & Memory, Rocks, Grit & STEM Guide

About this item

• A Smarter Starter Rock Tumbler for Kids: Designed for kids and first-time rock collectors, the C5 combines beginner-friendly operation with useful controls for learning the rock tumbling process. It is easy to start with the first batch while offering more flexibility as young hobbyists gain experience.
• Quieter Tumbling for Home Use: The rubber barrel helps soften rock impact, while the fitted noise-reducing cover adds another layer of sound reduction. Together, they create a quieter rock polishing experience for kids and families during the multi-day tumbling process.
• Simple Controls for First-Time Beginners: The colorful control panel and illustrated step-by-step guide make it easy to choose a tumbling time and speed, start a batch and check progress along the way. Beginners can focus on polishing rocks without complicated setup or programming.
• 3 Speeds, 9-Day Timer, Pause & Memory: Go beyond a basic starter rock tumbler with 3 adjustable speeds and a timer of up to 9 days for different polishing stages. Pause and resume to check the rocks, while the memory function keeps the previous settings for an easier restart.
• Complete Rock Tumbler Kit for the First Batch: Includes the C5 rock tumbler, rubber barrel, noise-reducing cover, 0.5 lb of assorted rough gemstones, 4 polishing grits, jewelry findings, mesh strainer, 2 replacement belts and an illustrated guide—everything needed to begin the first rock polishing project.
• Hands-On STEM Learning Through Rock Polishing: Kids can watch rough gemstones gradually become smooth, polished rocks while exploring geology, minerals and the step-by-step tumbling process. Finished stones can also be turned into jewelry and crafts for a hands-on science activity with a visible result.
• More Than a One-Time Rock Tumbler Kit: After polishing the included gemstones, young rock collectors can continue experimenting with suitable rocks they find and compare different results across batches. The C5 turns a first rock tumbling project into an ongoing geology and rock-collecting hobby.
• Official KoolStone Warranty – 𝟏 𝐘𝐞𝐚𝐫 𝐂𝐨𝐯𝐞𝐫𝐚𝐠𝐞 & 𝟗𝟎-𝐃𝐚𝐲 𝐑𝐢𝐬𝐤-𝐅𝐫𝐞𝐞 𝐓𝐫𝐢𝐚𝐥. Your purchase is protected by KoolStone’s official 𝟏-𝐲𝐞𝐚𝐫 𝐰𝐚𝐫𝐫𝐚𝐧𝐭𝐲 and a 𝟗𝟎-𝐝𝐚𝐲 𝐦𝐨𝐧𝐞𝐲-𝐛𝐚𝐜𝐤 𝐠𝐮𝐚𝐫𝐚𝐧𝐭𝐞𝐞. Shop with confidence — we’re here to support your tumbling journey.