Fun discovered at puzzles - and learned a lot

Our son (2.5 years) is a fan of the garbage trucks. In this respect, the subject of the puzzle is familiar to him and he pounced on it. The first time need to help mom and dad, of course. In this respect, agrees The age 4+ Now, after three weeks but he understood the principle: to lie down all the parts visible and then proceed systematically, that first look for corners or puzzle pieces with the edge, the sky is up, the pavement down, then continue preparatory work. Help the pre-cut outline of the necessary pieces of the puzzle on the pad. And now he can already make the puzzle all by herself! A great achievement for him. And he told this much of the garbage truck, which comes along with us and the details in the picture.
General to this framework Puzzles: Their advantage is that they are so nice and flat and space-saving. The disadvantage that the pieces are loose it. If the child is with the patient at the end, either the parents have to put all the parts ready in place. Or loose parts flying around in the closet, because there is only the cardboard backing and not cover it. Quick then what is missing. The pieces themselves are not very thick. The stability is sufficient but because they do not have the classic "noses" -Ausbuchtungen that are quickly hooked and pulled down the ages.