KELVIN® Cranes & Catapults
  • Design It! Trebuchets Guide

    Design It! Trebuchets Guide

    Introductory engineering experiences for after school programs and elementary school students (ages 8 to 12). Funded by the National Science Foundation and developed by Education Development Center, Inc. Design It! includes a guide for each project and...

    $9.95
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  • KELVIN® Adjustable Stop Catapult

    KELVIN® Adjustable Stop Catapult

    Allow your students through hands-on discovery to learn the fundamentals of force, energy, simple machines, Newton's Laws, trajectory and other science and math concepts with KELVIN®‚Äôs Adjustable Stop Catapult Kit. Simple assembly has...

    $9.95
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  • KELVIN® Build Your Own® Large Catapult

    KELVIN® Build Your Own® Large Catapult

    Using this kit, students can build catapults in various sizes, depending on their designs. The swing arm can be up to 24 in. long. The base is 18 in. long and 2-1/2 in. wide. The kit weighs 0.8 lbs. Students can then see which catapult is capable of...

    $7.95
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  • KELVIN® Build Your Own® Small Catapult

    KELVIN® Build Your Own® Small Catapult

    Design and build a small catapult with a 7-1/2 in. long base. The swing arm can be made up to 12 in. long. This kit weighs 0.3 lbs. Determine which catapult is capable of launching ping pong balls the farthest or the highest. An additional challenge is...

    $5.95
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  • KELVIN® Catapult Bulk Pack

    KELVIN® Catapult Bulk Pack

    Bulk Pack of 10 Kits As Low As $15.00 Per Kit Students can either design their own catapult or build one from the plans that are included. The design replicates an ancient catapult in which tension could be increased or...

    $115.00
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  • KELVIN® Catapult Kit

    KELVIN® Catapult Kit

    With this kit, students can either design their own catapult or build one from the plans that are included. This kit replicates an ancient catapult in which tension could be increased or decreased to alter the tossing distance. Requires hand tools...

    $14.95
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  • KELVIN® Creative Crane Individual Kit with Balsa

    KELVIN® Creative Crane Individual Kit with Balsa

    Students will design and build a lightweight crane that creatively lifts a variable load (P) from a structure a minimum vertical height (V) of 18 inches with a minimum horizontal (H) clearance distance of 9 inches from the edge of the tower or footprint...

    $12.95
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  • KELVIN® Gear Box & Pulley Activity

    KELVIN® Gear Box & Pulley Activity

    Learning about gears and what they can be used for (gearing for speed or for power) is an important aspect of many crane and vehicle activities and this kit enables students to do just that. Kit includes: Gear Set, Pulley Set, Creative Crane Pulley,...

    $8.95
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  • KELVIN® Gear Box & Pulley Activity Bulk Pack

    KELVIN® Gear Box & Pulley Activity Bulk Pack

    Bulk Pack of 20 Kits As Low As $6.25 Per Kit Learning about gears and what they can be used for (gearing for speed or for power) is an important aspect of many crane and vehicle activities and this kit enables students to do...

    $125.00
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