HST Rock Tumbling Guide

Engage the senses with this highly-detailed, interactive ear model with more than 20 parts.

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Discover Earth's intricate water cycle in this Accelerate Level (Grades 3-7) Earth and Space Kit. Your student will take a deep dive into the water cycle, turn salt water into fresh water and experiment with erosion.

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Investigate shade balls and the role they play in the cycling of matter and energy through ecosystems. Your 3-7th grade student will model how energy flows through ecosystems using food chains and food webs in this month-long biology kit.

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Use this paper chromatography kit to perform an exciting experiment. Learn the components of a chromatography system and why different substances separate and move at different rates within the system!

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Make some noise! You’ll be cheering with delight when you do these hands-on experiments about sound and vibration. Make things move without touching them, design a string phone, create a musical instrument, and more!

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With this photosynthesis kit, students explore the impact of different variables on the photosynthetic rate. Includes a detailed teacher's manual, reproducible student worksheets & materials sufficient for 8 lab groups.

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The classic crystal radio kit made even better with easy to understand instructions, solder-free building, and an amplifier as an alternative for full sound! It's the perfect set up for an engaging science fair project.

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These special glass microscope slides have a single concavity ground in the center of the slide.

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This tuning fork resonates at a set pitch when tapped.

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Sodium tetraborate (Borax) is an organic compound with the formula Na2B4O7. Borax powder is a naturally occurring mineral with many uses. Use it to make a bath bomb, a bouncy ball, or mix it with white glue to make slime!

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