Logic puzzle wooden TWENTYFIVE (25pcs)

LOGIC PUZZLE (Accompanied by his unique solution)
Try to fit 25 identical pieces into the box. Obviously, there is only one way to mount!
Take on the mental challenge of 'combine-combine' by employing concentration, imagination, logic and patience.

BUILDING DIFFICULTY: *****
MEMORY DIFFICULTY: *****

With 25 wooden pieces in a wooden box..

Size : 8.8 X 8.8 and height 8.8 cm.