Wooden Puzzle: 14 Piece Pyramid

This 14 pieces pyramid, with a triangle base contains 3 types of parts:

5 3D parallelogram alike pieces.

3 pyramids (a 3D triangle with a squire base).

& 6 3D triangle alike pieces

Plenty of pyramids can be build from the parts:
Try to build a 4 pieces pyramid,
A 5 pieces pyramid,
6 pieces pyramid,
7 pieces pyramid,
9 pieces pyramid
and of course 14 pieces pyramid.

The 14 pieces pyramid can be built in different variation.