Big Ball – 840 Piece Giant Sphere Assembly Puzzle

Big Ball is a spectacular large-scale assembly puzzle designed by Oskar van Deventer. Using 840 individual sticks (14 unique pieces, 60 copies of each), your task is to build a hollow sphere measuring an impressive 700 mm (27.5") in diameter.

Despite its intimidating size, the assembly process is surprisingly approachable. Every connection is marked with a matching letter, so it's simply a matter of connecting "A to A", "B to B", and so on. The challenge comes not from figuring out where the pieces go, but from the patience and teamwork required to bring such a large structure to life.

Inspired by Derek Bosch's Icosahedron Frequency-3 Sphere, the completed ball is held together purely by tension. Once assembled, it is remarkably sturdy and can be lifted and moved around without falling apart.

I had the opportunity to assemble one of these together with Oskar during the International Puzzle Party (IPP) while visiting the Puzzle Palace. Oskar did most of the assembly while I helped, and together it took us roughly four hours to complete. Watching the sphere gradually take shape was a fascinating experience, and the finished result is an absolute eye-catcher.

Big Ball is not just a puzzle—it's a conversation piece, a collaborative project, and a stunning display object once completed.

The puzzle can be printed in any single color or in a multicolored version to suit your preference.

Specifications

• Designer: Oskar van Deventer
• Diameter: 700 mm (27.5")
• Weight: 1.7 kg
• Pieces: 840 sticks (14 unique designs × 60 copies each)
• Assembly time: Approximately 4 hours (depending on the number of builders)
• Material: 3D printed PLA