K.S.
Hi S.,
It would be helpful to say what town you are in. For instance, in District 200 there is a FREE! sibshop (which is what these groups are usually called) once a year at Jefferson Preschool for older sibs. Anyone can attend. My 8 year old boy did last year and liked it. It was primarily Wheaton, Carol Stream and Warrenville kids.
A friend just sent me one from a place in Naperville, there are others I have heard of but they can cost quite a bit.
If your younger child has an IEP or uses EI services you should ask all the providers or teachers if they know of one. I know that some of the non-profit service groups in the area sometimes run them.
K., Wheaton