Probably the best thing we have gotten so far to help with Stella's development is an active learning play space. Michael's dad built it using instructions from this site:
It is modeled after the concept of the Little Room invented by Dr. Lilli Nielsen. The device is a multi-sensory learning tool that enables children with visual impairments to learn more about their surroundings and interact with their environments.
I am amazed at the changes I have seen in Stella in just a few weeks. While in the play space Stella is more active and more verbal than anywhere else. She knows where the toys are, seeks them out and plays with them, scoots all over the place and rolls onto her side to reach toys with both hands. She also loves to feel different textures on the sides of the play space. It's great because it is all self-directed learning. I just love this thing!