The Flexi-Cubus is a mechanical model. An octasphere puzzle in the form of a steampunk skeleton cube made out of eight joint-connected spheres. This flexible connection allows the spheres to move and roll over one another creating different geometrical shapes.
Putting UGears models together is fun and comprehensive: everything you need to build, learn, and discover comes in a box.
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UGears
UGears Flexi Cubus 2.0