Thank you all for your suggestions thus far!  Just to clarify our need, here is our situation:

We have about five kids with special needs whose parents are asking for something separate from our regular program.  We have a set of autistic triplets, two of whom have been mainstreamed with a mentor, a blind boy with some other cognitive challenges, and a little girl with Down's Syndrome. 

Our church also provides room space to a community organization that provides therapeutic arts to children with physical, mental and emotional impairments, so we have the possibility of more children attending. 

We plan to have the kids participate as they are able in the regular program, but we wanted to provide something for those who are just not able to do that. Our regular rotation model is called CrossWalks, and while we have names for our rooms, we don't have names for each age group.  We color code them instead, with the colors of the rainbow.