As a tester served my four year old grandson. He succeeded not yet even begin to turn the plastic screws under the guidance in the appropriate blocks of wood because the threads of the blocks are cut imprecisely, the screws have small ridges and thus the Schrauberei to challenge.
If something is too tight, the fun factor smaller people tend immediately to zero and Grandpa must then complete the kit, which indeed can not be the point of it.
I can unfortunately only conditionally recommend the construction kit.
