Parametric Reuleaux Tetrahedron 3D Printed Toy

The toy they will ask about long after the party.

2.7k downloads in the maker community

$7.99

Color: Gray

Printed in the USA when you order.

1.You order it
2.We print it fresh
3.It ships to you

Unique curved edges roll in all directions, so your fingers stay busy and your mind stays calm
Constant width design lets you spin it any way and it feels balanced, so you can fidget without frustration
Parametric model means you can customize the size before we print it, so you get exactly what you need
Solid geometric shape teaches math concepts through touch and play

You get a puzzle toy that feels smooth and satisfying in your hand. The reuleaux tetrahedron is a shape with constant width; it rolls the same way no matter how you turn it. This makes it fun to fidget with and rewarding to explore.

The design uses parametric geometry, which means it adapts to your needs. Want a bigger version for your desk. Want a smaller one for travel. You control the size before printing starts. The solid construction holds up to regular play and feels substantial when you hold it.

Perfect for curious minds who love geometric shapes, desk fidgeters, and anyone who enjoys toys that teach while you play. Spin it, roll it, and discover why constant width designs are so satisfying.