This is a kids toy that is made up of multiple extruded Octahedron shapes.

In geometry, an octahedron is a polyhedron with eight faces. The term is most commonly used to refer to the regular octahedron, a Platonic solid composed of eight equilateral triangles, four of which meet at each vertex. From Wikipedia.

A unique property of octahedron’s is that if you extrude the it along the x and y axis you create a shape that is stackable to create a larger octahedron. They can also be rotated will stack neatly.

The end result is a rather simple creative toy.

The shapes are based around 25mm Octahedron. To help prevent the risk of choking the smallest size comes in two forms, one is a solid, the other is hollow. The hollow cube will need support.

Resources

• Downloadable models on Printables
  • https://www.printables.com/model/637326-stackable-octahedrons-building-blocks
• Repo

Sample designs