Rekubus number cube "Starter"

Yellow, printed puzzle cubeto assemble into a fixed cube (without instructions)
--> NOT the same as the Rubik's cubes !!!

Starter
The numbers 1 to 9 are in ascending order and each side of the dice is identical.

supplied in 38 individual pieces
Only a few pieces left in stock

The slogan "Can you do it - or can it do you?" also applies to the "Starter" number cube.
1. find out how to assemble the cube stably and firmly.
2. once the construction principle is understood, the numbers 1 to 9 must always be arranged in ascending order on the 9 fields on each side of the cube, and in the same order on each side of the cube.
Edge length of the cube: 64 mm.