This is the second mobile to in the Montessori series. It is supporsed to be introduced between 5 and 8 weeks. Baby J has two "work" areas in the house. One in his bedroom and one in our living room. This mobile is in our living room tied to the light fixture. I have to say this was my favourite mobile to make, probably because it's the easiest! There is a full tutorial over at Little Red Farm. Instead of using metalic paper I used Dollar Store gift bags which were way more economical.
Update a week later and little Baby J is totally digging this mobile. I lay him under it in the evening when the sun is shining on it and he just watches and smiles. He loves it and I love watching him!