I enrolled my daughter at 2 1/2 months, in our class now (she is 3 1/2) there is a 4 1/2, 3, and 2 month old. The class is excellent for meeting other mommies, getting out of the house, learning new songs to sing, and getting adult time (we have even developed our our play group). The class for her at this age is more me interacting with her, doing tactile stimulation, etc. I definitely see her becoming more interested in things - even during the course of a class. I think level 2 (6 months) is a huge step, and cannot wait for that, but even at this level I think there is a lot to be gained.