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Rigamajig Basic Builder Kit


Our flagship product, the Rigamajig Basic Builder is a large-scale, loose parts building and engineering kit. The Basic Builder Kit inspires STEM / STEAM learning by empowering children to follow their curiosity through hands-on, open-ended, creative, and collaborative play. Big pieces, big ideas, endless possibilities!

Sturdy, durable, and made-to-last, the Basic Builder Kit is curriculum-compatible and ideal for schools, children’s and science museums, libraries, community organizations, maker spaces, camps, recreation centers, after-school programs, or anywhere that kids gather to play and learn!

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Sales tax is automatically applied to purchases delivered to NY, RI, and CA. 

For purchase orders, tax-exempt purchases to NY, RI, and CA, and shipping outside the contiguous 48 U.S. states, please use the 'Request a Quote' form.

More about Rigamajig Basic Builder Kit

  • Complies with U.S. Consumer Product Safety Testing for Children’s Toys and tested for ages 3+.
  • Intuitive assembly instructions for easy setup.
  • Requires a minimum play area of 100 square feet (per kit).
  • Made and manufactured in the U.S.
  • Fabricated using the highest grade Baltic birch plywood and finished with a HAPS-free (Hazardous Air Pollutant-free) finish.
  • Wing bolts, hex nuts, and brackets are made from reinforced 100% recycled nylon.
  • Contains over 260 parts, including wooden planks, wheels, pulleys, hooks, brackets, wing bolts, nuts, ropes, a cart with casters, and more.
  • Comes with two milk crates for convenient storage of small pieces.
  • The cart, when filled, weighs approximately 149 lbs.
  • Cart cover available for separate purchase.
  • Expandable with Add-Ons: Simple Machines, Chutes, and Locomotion.
  • Purchases with delivery in NY, RI, and CA are subject to sales tax.
  • Price does not include shipping.
  • Shipping is available at checkout for the 48 contiguous United States only.
  • For shipping to Alaska, Hawaii, Canada, and other international locations, please fill out the 'Request a Quote' form.
  • Purchase orders and payments via check or bank transfer require filling out the 'Request a Quote' form.
  • Interested in creating a focused exhibit and play area? Use it together with an interactive display and storage station: Rigamajig Workshops.
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Here are more Rigamajig products that you might like!

Simple Machines Add-On Kit

The Simple Machines Add-On Kit enables young collaborators to mechanize their Rigamajig Basic Builder Kit, making simple or complex systems that exemplify the principles of mechanics, direction, and force. Created and designed from educators’ feedback, our Simple Machines Add-On Kit expands the Rigamajig Basic Builder Kit to provide an additional perspective and range of STEAM-based discovery, tinkering, and exploration! Prerequisite: Purchased Rigamajig Basic Builder Kit or any Basic Builder Workshop with Materials.
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Chutes Add-On Kit

Our Chutes Add-On Kit transforms your Rigamajig Basic Builder Kit into a dynamic system of chutes and ramps, allowing children to experiment with cause and effect, gravity, and systems thinking. Rube Goldberg in action! Children can create contraptions using included assorted balls, as well as marbles, wheels, water, or anything else they can imagine. The exciting process of planning, collaborating, and building a ball or marble run just might become your favorite Rigamajig project! Prerequisite: Purchased Rigamajig Basic Builder Kit or any Basic Builder Workshop with Materials.
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Locomotion Add-On Kit

Expand your Rigamajig Basic Builder Kit with our Locomotion Add-On Kit to make rolling, spinning, mobile contraptions! Axles and axle bolts enable wheels, propellers, pinwheels, and more to spin freely, while swivel casters provide an immensely versatile range of motion. Our Locomotion Add-On Kit includes plenty of hex nuts to secure everything, and with eight long lengths of our soft, easy-untie rope, you’ll always have enough to pull, fasten, or practice knots. We can’t wait to see what you create! Prerequisite: Purchased Rigamajig Basic Builder Kit or any Basic Builder Workshop with Materials.
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