This is PI (pronounce: pee).
Measurements: 49 cm x 58 cm x 45 cm (l x w x h)
Price: € 150,00 euro

He is climbing out of the pyramid. PI is used to calculate the circumference and surface of circels, like all those tennisballs. His name also sounds like Py in pythagoras whose formulas are used to calculate measurements of a triangle. And this pyramid exists of 4 triangles. 

Like circels who have no beginning nor end, PI will always trying to climb out, but will never succeed. You see, much to do around PI.