ZometoolShop kits

Zometool

Bring math to life.

Connect colorful struts and balls to create 3D shapes, explore geometry, and build your own designs.

Shop kitsFor classrooms

Every hole has a shape.

Rectangles, triangles and pentagons in each connector ball decide where a strut can go, so the math is built into every piece.

  • Golden section proportions
  • 2-, 3- and 5-fold symmetry

Small builds become big ideas.

A first star turns into domes, bridges, crystals and shapes that reach into higher dimensions.

Treasured by kids and Nobel Prize winners.

The same system mathematicians and physicists have used in research fits right on the kitchen table.

Math kids can hold.

Zometool turns ideas from a textbook into things kids build, turn over and show off. Parents see focus. Kids see a giant star.

Close-up of a white Zometool connector ball with blue, yellow and red struts plugged in

  • Solids and shapes

    Cubes, pyramids and Platonic solids, built edge by edge until the idea clicks.

  • Symmetry

    Each connector ball carries 2-, 3- and 5-fold symmetry, so balanced shapes happen almost on their own.

  • The golden section

    Strut lengths follow golden section proportions, the same ratio kids spot in shells, flowers and art.

  • Stars and beyond

    Stellated stars, quasicrystals and models of shapes from higher dimensions.

Kits that grow with them.

Start small, add parts, and the same pieces keep working as projects get bigger.

  1. 01Start hereBASIC KitThe easy first step. Learn how balls and struts fit, then build your first shapes.
  2. 02Build biggerCreator 1More parts for freer, more ambitious builds at home.
  3. 03Go furtherCreator 3Room for large structures and long weekend projects.
  4. 04For classroomsThe STEAM KitMade for teachers, clubs and groups building together.

Project kits

For kitchen tables and classrooms.

Homeschool families use Zometool to make geometry hands-on. Teachers and enrichment programs use it so a whole group can build, compare and talk about the same shape.

A child's hands snapping a blue strut into a white connector ball while building a domeEmail our team
A boy looking through a long bridge he built from Zometool struts and balls

Born in Colorado, decades in the making.

The goal from the start: make this geometry easy enough for a six-year-old and deep enough for NASA, mathematicians and physicists, who have all used it in research.

  1. 1969

    Zomeworks is incorporated. Inventor Steve Baer, inspired by Buckminster Fuller's dome geometry, had created the earlier Zome system.

  2. 1979

    Marc Pelletier and Paul Hildebrandt start developing the connector ball in Boulder, Colorado.

  3. 1992

    On April 1, the first connector ball comes off a mold machined by Bob Nickerson in Denver.

  4. 1997

    Their company, BioCrystal, Inc., becomes Zometool.

What people say

“Beautifully made — the perfect construction kit for quasicrystral models, and for many structures of mathematical interest.”

Sir Roger Penrose, Nobel Prize winning physicist and mathematician

“Zometool helps me make beautiful objects. I love it!”

Dr. John Conway (1937-2020), mathematician

Honors along the way

  • 1999Parents' Choice Gold Award
  • 2000Oppenheim Toy Portfolio Gold Seal Award
  • 2003National Association for Gifted Children Holiday Toy List
  • 2005Dr. Toy Best Smart Toy Product
  • 2012Creative Child Magazine Product of the Year
  • 2013Popular Science Best of Toyfair

Say hello.

Zometool Inc.
1040 Boston Ave
Longmont, CO 80501
Call(720) 442-8616Toll-free1-855-966-3866Emailsupport@zometool.comGet directions