I bought this craft kit for my 3.5 year old daughter and have to say: Really great! She had so much fun while bonding and has also been very good job with assistance For my part, what part requires, and must first be glued, so I definitely say that the craft set makes sense even for children from 3-4 years and is fun. You have to just leave it a try. Of course, the pictures look after not so beautiful, as if it has a 6-year-old child, but that's no matter.
For material I can say: It is very neat. The boxes which will be glued are not too thick, but ok, everything is mapped out. You can also see what is to be adhered first. The sticker itself can be detached very well and can also pull off directly after sticking again to correct.
Conclusion: Very nice job even for the little ones!