This is a decorative ball made of 3mm MDF wood.
It is basically a dodecahedron, using the "living hinge" technique to join the faces.
The faces assemble using jigsaw, and I would recommend to hot glue them progressively otherwise the small movements made while joining new faces will undo previous joins.
Once finished, your can paint it.
Inspired from http://www.thingiverse.com/thing:398193