The Rainbow Ring Mobile

At Home with Montessori has some really useful information on infant mobiles, including one similar to this Rainbow Ring. I am still wondering though what is the link to Montessori? Any ideas? 

It is a beautiful mobile but hasn't made it to Otis's room. Caspar liked it so much it went straight in his room. Caspar has now decided that he will have the Dancers in his room so the Rainbow Ring is now centre stage near our kitchen. It is a great location really, I can still put Otis under it and it keeps him busy while I am trying to prepare a meal, or get something to eat myself! I think it will stay here for a while. 

It is made of felt so it is light and looks lovely and natural. This one is from Bella's Casa (we purchased the Dancers and the Rainbow Ring as a set!). Bella's Casa have some new felt letters and numbers which look wonderful too!