Looks great! Large building experience for my son!

I was a little skeptical about the quality of these 3D puzzles. Also, because some customers have written here that the accuracy and stability of the individual puzzle pieces would not be as good. I have my 11-year-old son vaccinated in this regard before the assembly that he should be careful with the stones. What happened? I myself is a puzzle piece actually broken, my son not ;-) I then prefer to leave him alone to continue building! Everything worked great and the lights in the dark it looks really great!