Please be aware that not all toys made from wood are Montessori material, I think a lot of people have that mis-concept. Puzzles (wooden & cardboard type) are used in Montessori classrooms because they have error control, i.e. children would know that they are wrong automatically so that they could work independently. So that when I choose a new toy, I would first think about if it has error control or not, even if they have they would probably be considered as supplement & not strickly Montessori.