My 1.5 y.o. son has been attending Discovery Montessori School (in DB) Wobbler class for 1/2 a year now, which run by Little Montessorian. We all think he has learned a lot from it. He has learned good manners, putting things back when you're done with them, and is concentrating much better than before. For my very very very active son, those are impressive feats.